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Ostoj kaj organoj en la strukturo de la homa korpo

La homa korpo: Ĝi konsistas el multaj organoj kaj organoj, kies ĉiu parto plenumas unu aŭ plurajn proprajn funkciojn, kaj ĉiu parto de ĝi estas nomata organo. Organo estas parto de la korpo de organismo, kiu plenumas unu aŭ plurajn funkciojn.

Estas multaj organoj en la homa korpo, kiujn ni mencias al vi, inkluzive: la okuloj, la orelo, la lango, la koro kaj aliaj, kaj ĉiu grupo de organoj kunlaboras unu kun la alia kaj kompletigas la aspekton de la vivo. Ĝi nomiĝas maŝino, kaj ĝi estas grupo de membroj, kiuj kunlaboras kunlabore kaj regulece por fari ŝajnon de vivo. Kaj se vi ekzamenas vian korpon de interne, vi trovas en ĝi aparatojn, kiuj plenumas diversajn aspektojn de la vivo: la spira sistemo, la digesta sistemo, la cirkula sistemo, la nerva sistemo, la muskola sistemo kaj aliaj, ĉi tiuj aparatoj kunlaboras unu kun la alia kaj laboras regule tagon post tago, por ke la homa korpo vivu.

Homaj ostoj

Homaj ostoj varias laŭ siaj grandecoj kaj formoj. Ili estas cilindraj, plataj, sferaj, iuj longaj, iuj mallongaj, iuj dikaj, kaj iuj maldikaj, kaj ankaŭ kavaj kaj ne kavaj.

La grupo de ostoj en la korpo interligas por konsistigi la skeleton de la korpo. En la kranio estas grava mola parto, kiu estas la centro de sento kaj kontrolo en la homa korpo kaj nomata cerbo.

La ostoj de la kranio estas fortaj kaj rigidaj, kiuj protektas la cerbon interne, same kiel la okulojn kaj atriojn.

Skeletaj funkcioj

La skeleto plenumas kelkajn gravajn funkciojn por la korpo, inkluzive: 1. Protekti gravajn korpajn organojn kiel la koro kaj cerbo. 2. Subteni la korpon kaj doni al ĝi ĝeneralan formon. 3. Ĝi helpas la movadon de la korpo, pro ĝia ligo kun muskoloj kaj la ĉeesto de artikoj inter la ostoj. 4. La formado de eritrocitoj en la ruĝa osta medolo

La strukturo de la ostoj konstante ŝanĝiĝas, ĉar la sango transportas de ili substancojn uzatajn de aliaj organoj de la korpo kaj kompensas ilin el tio, kion ni manĝas kaj kio estas farita el vitaminoj en niaj korpoj. La korpo laboras por konservi la rigidecon de la ostoj, do la procezo preni materialojn de la ostoj kaj anstataŭigi ilin estas kontinua procezo, kaj la ostoj ne malstreĉiĝas en ĉi tiu agado.

Sed kun la alveno de mezaĝo, la anstataŭigo de materialoj en la ostoj komencas malpliiĝi, ekde la aĝo de kvardek jaroj, ĉar la osta maso komencas malpliiĝi ĉiujare kun rapideco de 1%. Ĝia aĝo estas kritika. Kaj la ostoj estas minacataj de frakturo, precipe la vertebroj de la spino, aŭ la dolora sento de la virino. Por viroj, osta denseco ankaŭ malpliiĝas kun kreskado de aĝo, pro la malpliigo de la vira hormono testosterona en maljuneco.

Movado kaj ekzercado helpas la korpon akiri kvanton da kalcio per manĝaĵoj kun rapideco de 1 gramo tage. Kalcio helpas formi D.-vitaminon. Kaj fizika movado gravas en ĉi tiu areo, kiu estas la funkciado de muskoloj, marŝado, kurado, saltado de ŝnuro aŭ portado de malgrandaj pezoj, ĉar la funkciado de muskoloj stimulas la trairon de sango en la muskoloj kaj en la ligaj tendenoj kaj tiel stimulas ostan formadon.

Komponentoj de la homa korpo

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The progress in the understanding of electromagnetism led to the widespread use of electrical devices such as television and computers, as well as the applications of thermodynamics to the amazing development in the field of engines and modern means of transmission, and quantum mechanics to the invention of equipment such as the electron microscope, and the atomic age - in addition to its destructive effects - had important uses Most physicists today are usually specialists in two complementary fields, namely theoretical physics and experimental physics, and the first is interested in formulating theories by adopting mathematical models, while the second is concerned with testing those theories, in addition to discovering new natural phenomena. In spite of the huge number of important discoveries made by physics in the past four centuries, many questions remain unanswered so far, and there are theoretical and applied fields that witness intensive research and activity.
The word physics comes from the Greek language and means "knowledge of nature." Initially, it was Arabized from the Greek to physics, and a number of Arab scholars at the dawn of Islam used this name, and some of them used the word physics sounding with the word chemistry. And now the word physics is no longer used, and the word physics remains the one used, and it has also been Arabized from natural science to natural, with the word physics and the word chemistry.
Astronomy is one of the oldest natural sciences. Early civilizations dating back to before 3000 BC, such as the Sumerians, ancient Egyptians and the Indus Valley Civilization, had predictive knowledge and a basic understanding of the motions of the sun, moon and stars. Stars and planets were often worshiped, and are believed to represent deities. While explanations for the observed positions of the stars were often unscientific and lacking evidence, these early observations laid the foundation for later astronomy, as the stars were found to traverse large circles across the sky, which did not explain the orbits of the planets.
According to Asger Apo, the origins of Western astronomy can be found in Mesopotamia, and all Western efforts in the exact sciences descend from late Babylonian astronomy.
Egyptian astronomers left traces showing knowledge of the constellations and the movements of the celestial bodies, while the Greek poet Homer wrote many celestial bodies in his book "The Iliad" and "The Odyssey"; Later Greek astronomers provided names, which are still used today, for most of the constellations visible from the Northern Hemisphere.
Natural philosophy has its origins in Greece during the Archaic era (650 BC - 480 BC), when pre-Socratic philosophers such as Thales rejected unnatural explanations of natural phenomena and declared that every event has a natural cause. They proposed ideas verified by reason and observation, and many of their hypotheses proved successful in experiment; For example, the correct atomism was found around 2000 years after it was proposed by Leucippus and his student Democrit.

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The Western Roman Empire fell in the century and the Eastern Roman Empire (also known as the Byzantine Empire) resisted the attacks of the barbarians, and continued to advance various fields of education, including physics.
In the 16th century, Isidore of Miletus created an important collection of Archimedes 'works that were copied from Archimedes' Tarsus.
In the 16th century, John Philoponus, a Byzantine scholar, questioned Aristotle's teachings of physics and pointed out their flaws. Introduced momentum theory. Aristotle's physics was not examined until John Philoponus appeared, and unlike Aristotle who built his physics on verbal argument, Philoponus relied on observation. On Aristotle's physics John Philoponus wrote:
"But this is completely wrong, and our point of view may be supported by actual observation more effectively than any kind of verbal argument. If you let objects fall from the same height where one is more weight than the other, you will see that the ratio of times required for movement does not depend on the ratio of weights." , But the difference in time is very small. Thus, if the difference in the weights is not large, and this means that one of them, we say, double the other, there will be no difference, otherwise there will be an imperceptible difference in time, although the difference Weight does not mean that, with one body weight twice the weight of the other.
Newton also developed the calculus, the mathematical study of change, which introduced new mathematical methods for solving physical problems. The discovery of new laws in thermodynamics, chemistry, and electromagnetism resulted from larger research efforts during the Industrial Revolution as energy needs increased. Laws comprising classical physics remain very widely used for everyday-scale objects traveling at non-relativistic velocities, since they provide a very close approximation in such cases, and theories such as quantum mechanics and relativity simplify to their classical counterparts at that point. Ranges. However, imprecision in the classical mechanics of very small objects and very high velocities led to the development of modern physics in the twentieth century.
The development of physics answered many of the questions of early philosophers, but it also raised new questions. The study of philosophical questions surrounding physics, the philosophy of physics, includes issues such as the nature of space and time, determinism, and metaphysical expectations such as empiricism, and realism. Many physicists have written about the philosophical implications of their work, for example Laplace, who advocated causal determinism, and Erwin Schrödinger, who Books on Quantum Mechanics. Mathematical physicist Roger Penrose called it Stephen Hawking, a view Penrose discusses in his book, The Road to Reality. Hawking referred to himself as a "shy shorter" and raised Penrose's problem.

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John Philoponus' critique of the principles of Aristotelian physics served as an inspiration to Galileo Galilei, Galileo was widely cited in his work when he argued that Aristotelian physics was flawed. In the thirteenth century AD, Jean Bredan, a teacher at the Faculty of Arts at the University of Paris, developed the concept of impetus. It was a step towards modern ideas of immobility and momentum.
Scholars of the Islamic era inherited Aristotelian physics from the Greeks and during the Islamic Golden Age they developed it further, especially with an emphasis on observation and preconceived thinking, and the development of early forms of the scientific method.
The most notable innovations were in the field of optics and vision, which came from the works of many scholars such as Ibn Sahl, Al-Kindi, Ibn Al-Haytham, Al-Pharisi and Avicenna. The most notable work was the Book of Optics, written by Ibn al-Haytham, in which he categorically refuted the ancient Greek idea of ​​vision, but also came up with a new theory. In the book, he provides an examination of the phenomenon of the camera obscura (a thousand-year-old version of the pinhole camera) and delves deeper into the way the eye itself functions. Using anatomy and the knowledge of previous scientists, he was able to begin explaining how light enters the eye. He asserted that the rays of light are focused, but an actual explanation of how the light projected onto the back of the eye was waiting until 1604. His thesis was made clear by the light of a camera obscura, hundreds of years before the recent development of photography.
The seven-volume Book of Optics has greatly influenced thinking across disciplines from visual perception theory to the nature of perspective in medieval art, in both East and West, for more than 600 years. Several later European scientists and his colleagues were polymers, from Robert Grossetti and Leonardo Da Vinci to René Descartes, Johannes Kepler and Isaac Newton, in his debts. In fact, the Ibn Al Haytham Effect for Optics ranks alongside the Newton Effect of the same title, which was published 700 years later.
The translation of the Book of Optics had a major impact on Europe. From this, European scientists later were able to build devices that replicated those created by Ibn al-Haytham, and understood the way light worked. From this, important things such as glasses, magnifying glasses, telescopes, and cameras were developed.
Physics became a separate science when early modern Europeans used experimental and quantitative methods to discover what are now considered the laws of physics.
Major developments in this period include the replacement of the geocentric model of the solar system by the Copernican model of the solar system, laws governing the movement of planetary bodies defined by Johannes Kepler between 1609 and 1619, in the field of telescopes and observational astronomy by Galileo Galilei in the sixteenth and seventeenth centuries, and the discovery of Isaac Newton and the unification of the universal laws of motion and gravity that will bear his name.

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Modern physics began in the early 20th century with quantum theory and the theory of relativity. Each of these theories came about due to inaccuracies in classical mechanics in some cases. Classical mechanics predicted a varying speed of light, which could not be solved at the constant velocity predicted by Maxwell's electromagnetic equations; This discrepancy was corrected by Einstein's special theory of relativity, which replaced the classical mechanics of fast-moving objects and allowed for a constant velocity of light. Black-body radiation presented another problem for classical physics, which was corrected when Planck suggested that the excitation of material oscillators is only possible in discrete steps proportional to their frequency; This, combined with the photoelectric effect and a complete theory that predicts the discrete energy levels of electron orbits, led to a theory of quantum mechanics that took over from classical physics at very small scales. Quantum Mechanics will be led by Werner Heisenberg, Erwin Schrödinger and Paul Dirac. From this early work, and work in related fields, the Standard Model of particle physics was derived. After a particle with properties compatible with the Higgs boson was discovered at CERN in 2012, all the basic particles predicted by the Standard Model, but not others, appear to be present. However, physics outside the Standard Model, with theories such as supersymmetry, is an active area of ​​research. Areas of mathematics in general are important in this field, such as the study of probabilities and groups.
In many ways, physics stems from ancient Greek philosophy. From Thales' first attempt to characterize matter, to Democritus, Ptolemaic astronomy of geocentrism, and Aristotle's Physics (an early book on physics, which attempted to analyze and define motion from a philosophical point of view), many Greek philosophers presented their own theories of nature. Physics was known as natural philosophy until the late eighteenth century.
While physics works to explain the laws of nature in general, each theory explains a restricted field. For example, we find that the laws of classical mechanics accurately describe systems whose size is greater than the atom and whose velocities are much less than the speed of light. As for outside those limits, we find that the viewing does not match the accounts.
Albert Einstein contributed to his special relativity formulation in 1905, which shows that there is no absolute place or time, and connected the two in what is called space-time for systems whose velocities are close to the speed of light. Subatomic particles and were able to give an accurate description of the nature of the atom and the nature of the elementary particles.

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Quantum field theory unified quantum mechanics and special relativity. General relativity describes movement in a curved space-time and accurately describes large-mass systems at the level of stars and galaxies in the universe.
It has not yet succeeded in linking general relativity with other theories, but scientists are working on this path, i.e. linking general relativity (which is the theory of very large systems) with quantum theory (which is the theory that describes atomic and subatomic systems) and there are currently several proposed theories of quantum gravity. .
Classical physics includes traditional branches and topics that were well recognized and developed before the beginning of the twentieth century (classical mechanics, acoustics, optics, thermodynamics, and electromagnetism). Classical mechanics is concerned with bodies that act by forces and moving bodies and can be divided into static (the study of forces on an object or bodies that are not subject to acceleration), kinematics (the study of motion without looking at its causes), and dynamics (the study of motion and the forces that affect it); Mechanics can also be divided into solid mechanics and fluid mechanics (collectively known as continuity mechanics), the latter comprising branches such as hydrostatics, hydrodynamics, aerodynamics, and pneumatics. Acoustics is the study of how sound is produced, controlled, transmitted and received.
Important modern branches of acoustics include ultrasound and the study of high-frequency sound waves that exceed the range of human hearing; Vital acoustics, the physics of animal calls and hearing, electroacoustics, and the manipulation of audible sound waves using electronics. Optics, the study of light, relates not only to visible light but also to infrared and ultraviolet rays, which exhibit all phenomena of visible light except for vision, for example, reflection, refraction, interference, diffraction, scattering, and polarization of light. Heat is a form of energy, the internal energy possessed by the particles that make up matter; Thermodynamics deals with the relationships between heat and other forms of energy. Electricity and magnetism have been studied as one branch of physics since the close relationship between them was discovered in the early nineteenth century. An electric current creates a magnetic field, and a changing magnetic field induces an electric current. Electrostatics deals with electric charges during rest, electrodynamics with moving charges, and magnetic electricity with the remaining magnetic poles.
One of the important concepts in classical mechanics is the principles of preserving momentum of motion and energy. This prompted the mathematical reformulation of Newton’s laws of motion in Lagrange Mechanics and Hamilton’s mechanics by adopting this principle. The two mechanical formulas in describing the behavior of bodies stand on the same level of precision, but in a manner independent of the system of forces exerting upon them, which is sometimes impractical in forming an equivalent