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Sunday, April 26, 2009

Human blood.

Picture

Blood is the human body fluid network. Its main function is to carry oxygen is required by cells throughout the body. Blood also supply the body with the nutrition network, carry the remaining oxygen-oxygen metabolism, and it contains a variety of immune system that is aimed at maintaining the body from various diseases. Hormones from the system endokrin also circulated through the blood.

Human blood have red, the red light when the oxygen-rich red to dark when the lack of oxygen. Red color of the blood caused by the hemoglobin, protein respiratory (respiratory proteins) that contain iron in the form of heme, which is a place-bound molecular oxygen molecules.

Humans have a closed circulatory system, which means the blood flow in the blood vessel and circulated by the heart. Blood pumped by the heart to the lungs to release the rest of the metabolic form of carbon dioxide and absorb oxygen through the arterial duct pulmonalis, and brought back to the heart through the vena pulmonalis. After the blood delivered to the whole body by the blood vessel channel aorta. The blood to circulate oxygen throughout the body via channels called the fine blood vessel capillary. Blood and then return to the heart through a vein and superior vena Cava inferior vena Cava.

Blood also carry the rest of the metabolism of materials, medicines and chemicals foreign to the heart and to be explained to the kidney to be removed as urine.


[edit] Composition
Blood consists of several types of korpuskula that formed 45% of the blood. 55% of the other form of liquid colors that form a liquid medium called blood plasma of blood.

Korpuskula blood consists of:

Red blood cells or eritrosit (about 99%).
Eritrosit not have a cell nucleus or organela, and not considered to be in terms of cell biology. Eritrosit contain hemoglobin and distribute oxygen. Red blood cells also play a role in determining blood type. People suffering from lack of eritrosit disease anemia.
Chip-chip or blood trombosit (0.6 - 1.0%)
Trombosit responsible in the process of blood coagulation.
White blood cell or leukosit (0.2%)
Leukosit responsible for body immune system and served to destroy the things that are considered foreign and dangerous by the body, eg virus or bacteria. Leukosit are amuboid or do not have a fixed form. People leukosit excess leukimia suffering from the disease, while those who lack leukosit suffering from the disease leukopenia.
Blood plasma is essentially a water solution containing: --

albumin
of blood freezer
immunoglobin (antibody)
hormone
different types of protein
different types of salt

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