One characteristic of being "human" is the transport and transport systems are present in the body, the goal is to deliver the materials needed anymore.
Whole food substances released by the transport system to all parts. In the body of a single-celled creatures such as protozoa, for example, or many-celled creature that is always a process of transportation and circulation of nutrients.
The food is transported by the ingestion of blood from the intestines into the body tissues. In addition, blood carries substances that are no longer needed by the body to the outside of the body. Hemoglobin (Hb) to carry oxygen (O2) into the tissue cells and otherwise raise the oxygen from the tissue cells.
Blood also has other functions, which keep the osmotic pressure between blood and tissue cells remained normal, keep the acid-base balance in the blood remains, regulate body temperature, and as a means of "defense" against attack or onslaught of disease.
Cardiovascular System, Blood is the main transporter in our bodies. Human blood is red, but color is not fixed. Sometimes the color crimson or pink, it depends on oxygen levels and carbon dioxide levels.
In general, the functions of blood are:
a. Transporting the food from the intestines to the network. Working as the transport system of the body and deliver all the chemicals, oxygen and nutrients needed to function normally be allowed and disposing of carbon dioxide and other waste products.
b. Cell red blood (erythrocytes) to deliver oxygen (O2) from the lungs to the tissues of carbon dioxide (CO2) from the tissues to the lungs.
c. Cell white blood (leucocytes) provides plenty of protective material and because the movement of several cell phagocytosis, it protects the body against bacterial attack.
d. Blood fluids (blood plasma) separates proteins needed for tissue formation, spreading the tissue fluid because the fluid is all body cells receive the food. And a vehicle to transport the waste material into various organs for disposal expenses.
f. Regulate acid-base balance of blood to avoid tissue damage due to the compound buffer (buffer) in the form of hemoglobin, oxyhemoglobin, bicarbonate, phosphate, and plasma proteins.
Protein in blood plasma consists of:
1) Antiheolik, useful to prevent anemia
2) tromboplastin, useful in the process of blood clotting
3) protrombin, plays an important role in blood clotting
4) Fibrinogen, has an important role in blood clotting
5) Albumin, useful in the maintenance of blood osmotic pressure.
6) gammaglobulin antibodies useful in the compounds.
g. Transporting the metabolism of the tissue to the tools of expenditure.
h. Transporting heat energy from the active to the inactive.
i. Circulate water through the body.
j. Hormones circulate throughout the body of the gland hormones
k. Enzymes circulate throughout the body.
l. Fight infection with antibodies and leucocytes.
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