Monday, February 12, 2018

What are the components of blood?

The total blood volume in an adult is about 5.5 liters. The blood consists of a fluid and formed elements.

Formed elements include:
Red blood cells
White blood cells

Of the total volume in the human body, 50% - 60% is plasma or the liquid portion of the blood.

Various components of blood each play a role.  In humans, blood cells are produced by stem cells in the bone marrow.

Plasma is a protein-rich solution. It is the fluid portion of the blood in which electrolytes, nutrients, metabolites, vitamins, hormones, gases and parties are dissolved.

Red blood cells or erythrocytes transport O2 and play an important role in pH regulation. The cells deliver hemoglobin, which is the iron-bearing protein that makes the transportation of oxygen possible.

Hemoglobin also gives human blood and that of many other animals, its red color. The red blood cells normally make-up 40%-50% of the total blood volume.

White blood cells can be divided into neutrophilic, eosinophilic, and basophilic granulocytes, monocytes and lymphocytes.

Neutrophils play a role nonspecific immune defense, whereas monocytes and lymphocytes participate in specific immune response.

Eosinophil is an important defense against parasitic infections. It will increase in allergic states such as hay fever, asthma.

Platelets are needed for hemostasis. Platelets or thrombocytes are cell fragments without nuclei that work with blood clotting chemicals at the site of wounds.

The research has shown that platelets help fight infections by releasing proteins that kill invading bacteria and some other microorganisms.
What are the components of blood?

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