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Physiology is focus on human body process function. However, anatomi is place, shape, structure, and between organs and formation.
Cells
The smallest building unit that forms a living organism is called a cell. All living thigs come out off cells. Although the cells seems to act independently , they actually work together. Cells multiply in multi – celled organism. Our bodies are made up of a wide variety of cells and substances filling between the cells. We know that some basic activities for cells are common. For example , the amniotic cells, which are the liver cells of the human body and the single – celled orgaisms , are quite similar to each other in replicating and detecting signals . All human organism begins out like a single cell, a fertilized egg. This single cell continues as two cells that divide into two cells and divide into four cells. Each cell type is called cell differentiation in the process of conversion to a different cell lineage. Cell differentiation is a very common process in arrow cell organism. This process continues for a lifetime. In fact , all the cells of a person have the same genes. Cells migrate to new places during development and form selective adhesives to produce multicellular structures. Differentiated cells with similar characteristics come together to form the tissues. This creates the organs of tissue that come together. Organ systems to form organisms. Approximately two hundred different cell types are described in terms of structure and function in the human body. Cells are separated according to their function types. The first of which is muscle cells, the second is nerve cells, the third is epithelial cells, and the fourth is connective tissue cells. The muscle cells : the function of muscle cells is to produce movement (by contraction). Other function is of shorten the lenght of the muscle (when the signal goes). Type of signals by receiving electrical signals . This signals motor areas send information (motor nerves carry motor information). The information from the brain reaches the muscles together with the spinal cord and the electrical signals (by making the action potential). Action potential contract muscle. Muscles never stretch by action potential. Ach respose for the action potential in peripheral nervous system and also on muscle. The action of bringing the fronts of two body parts closer together is called flexion. For example it is like bringing the anterior aspect of the forearm to the front of the arm through the elbow joint. The act of separating the fronts of two body parts from one another is called extention. In other words, pulling. The other cell type is nerve cells. Nerve cells produce elektrical impulses and making the action potentials. Specialized cells transmit electrical impulse over long distances. They form synapses (to conduct with other neuron). Nerve cells are composed of soma, dendrites, axons, and myelin membrane. The synapses have three types. Firstly is pre synaptic membrane, secondly is synaptic cleft, third is post synaptic membrane. The other cell type is epthelial cells. Epithelial cell is the name given to the cells that make up the tissues of our body. Cells containing DNA come into play. Finally there are connective tissue cells.
Tissues
Muscle cells come together to form muscle tissue. This event applies to other cells. So, nerve cells come together to form nerve tissue. Epithelial cells come together to form epithelial tissue. And finally connective cells come together to form connective tissue. Defined as an aggregate of a single type of specialized cell. Percent of the body weight of an adult person is thirty or seventy percent sudden. Water is in the cell, around it, and in all blood vessels. The fluid outside the cell is called extracellular fluid. Constitute about thirty percent of the total body fluid. The extracellular fluid is also contain blood. About twenty or twenty-five percent of thirty percent of the liquid forms the plasma. The remaining approximately seventy-five percent or eighty percent is interstitial fluid. Interstital fluid is lies around and between cell. Intracellular fluid is inside th cell and the composition of exracellular fuid is different from intracellular fluid.
Chemical Elements in The Body
Atoms are the smallest part of the body. Oxygen, carbon, hydrogen, nitrogen ae the major elements (99.3%) in human body. Caicium, phosphorus, potassium, sulfur, odium, chlorine, magnesium are the mineral elements (0.7%) in the human body. Atoms consist of three parts : 1) neutrons, 2)protons, 3)electrons. The proton has positive charge, neutron has no eletrical charge, and electron has negative charge. The atomicnucleus has proton and neutron. The nucleus has positive charge because neutrons have no electrical charge. In total atom has neutral because number of electron and number of protons are equal . The atom can lost or gain electron.

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