pancreas, its function and operation mechanism.
The human body is a beautiful self-regulating system, artificial analogues - robots or even detailed computer models - does not exist.They may appear in the future, but for today we humans are a unique phenomenon;the complexity of its "design" - even if you do not talk about quality, but only on the quantitative aspects - we are quite comparable with the Galaxy.This statement should not be taken at the expense of our anthropocentrism, since it is based on the very real fact: in the galaxy about one hundred billion stars, but our brain contains fifteen billion neurons.As you can see, is quite comparable magnitude.
Now let's deploy the certain part of the fifteen billion brain cells and remembered school lessons anatomy, imagine how we "arranged".Firstly, we have the bones or skeleton of a carrier;in the joints of the fingers, wrists and ankles, in the elbow, knee, shoulder and hip joints and other places are jointed bones, and there they are covered with
internal organs , the third important component of our "design", also have a large margin of safety, and some even in the present embodiment, the pair - for example, lungs and kidneys.But the heart, brain, stomach, pancreas, spleen, bladder, gallbladder, liver, and gastrointestinal tract are we in a single copy and irreplaceable.
fourth component of the human body are nervous, circulatory and endocrine systems.We note that we call them the "fourth pillar" in the general sense;each of them - a complex system, and each - their functions.
nervous system transmits information (irritation as biologists say) from the visual, tactile, and other receptors in the brain, as well as the response of the brain commands the muscles, for example, we see the apple and reaches out to take it.Thus, with the help of the nervous system control is realized by our conscious or instinctive responses to stimuli of the environment;The main body of the nervous system, its command center is the brain.
circulatory system provides power cells that make up all the internal organs (including the brain), as well as muscle tissue, skin, and so on.Blood vessels penetrate the light - and the intestinal wall: from the lungs into the blood stream to the cells of oxygen to enter from the intestines - glucose and other nutrients.The blood pump is run - the heart, which reduces the normal operation of the organism 60-80 times per second and pumps per day 3400-5400 liters of blood per one square meter of body surface.With regard to waste, they are eliminated from the body as follows: gaseous - breath through the larynx;solid - through the intestinal tract and anus;liquid - are filtered in the kidney are collected in the bladder and urinary ejected through the channels.
nerve trunks, nodes and large blood vessels are fixed in their position in the body, described by physicians and have special names.But the tiny nerves (nerves) and the tiny blood vessels (capillaries) that permeate all the tissues of the body, can not be taken into account with the same thoroughness.They are - everywhere;at whatever point you are no body pricked with a needle, you will feel the pain and see a drop of blood.These tiny nerves and capillaries, small vessels can be considered analogous to tiny rivulets, but they are just as important as the deep rivers.Capillaries-streams deliver food to every cell and nerve-streams provide the sensitivity of the body;together they run trophico, ie power organs and tissues, which is necessary for normal functioning of the body.If these streams become deficient, begins atrophy of tissues, wounds and scratches heal stop, slow down the regeneration of cells, tissues lose their sensitivity.
We see that the nervous and circulatory systems can be likened to a river and its tributaries, a tree with many branches, or wiring in some super sophisticated instruments;and in both cases, these systems have their own governing center, respectively the brain and heart.The endocrine system is "arranged" a little differently.It includes located in different parts of the body endocrine glands - the pituitary gland, thyroid, pancreas, gonads, and some others.These glands produce certain chemicals called hormones, which are derived from the glands directly into the blood and carried by the blood with oxygen and nutrients.Hormones as required by the body as nutrients and oxygen;they affect the whole range of life processes - such as energy metabolism and growth process, the level of sugar in the blood and calcium, and so forth.The lack or excess of a hormone leads to disease.
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