Definition, Functions and Components of Blood

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Blood is a fluid on living beings (humans and animals), red color, found in blood vessels.
Blood functions are:
1. Sending substances and oxygen needed by the body tissues.
2. Transporting chemicals as the body metabolism results.
3. as the body defense against infections (bacteria and viruses).
How much blood is in the human body? The amount of blood in the human body is as much as 4.5 to 6 liters.
The main components of blood are:
1. Blood Cells
Definition of blood cells are all cells in various forms found in blood.
In the blood structure, blood cells are as much as 45%.
Blood cells consist of:
a. Erythrocytes (red blood cells)
Erythrocytes or red blood cells represent the largest or most portion that is as much as 99%.
b. Leukocytes (white blood cells)
White blood cells are bulkier than red blood cells. Forms of white blood cells are lymphocytes, basophils, neutrophils, monocytes, and eosinophil.
c. Thrombocytes (platelets)
Thrombocytes or Platelets formation is in red marrow, the number of platelets in 1 mm3 is 25,000 platelets. Platelet function is helping in blood clotting.
2. Blood Plasma
Definition of blood plasma is the part of liquid blood that is yellow; it serves as a medium of blood cells. In the blood structure, blood plasma is as much as 55%. In blood plasma, there is fibrinogen that functions in the blood clotting process.
Blood plasma consists of:
a. Water
b. Protein
c. Ions, glucose, enzymes, hormones, creatine, Urea.

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