2. Which blood cell in human blood carries haemoglobin? What is its average life span?

Question

Answer

RBC in human blood carries haemoglobin.In the body of healthy human it live for 100 to 120 days and in full term infant it live for 80 to 90days.The average life span of RBC is 120days.

Answer

Red blood cellcontain a special type of protein called   haemoglobin

Answer

RBCs (Red Blood Corpsules) contains haemoglobin,the respiratory pigment which carries oxygen to different tissues of the body in the form of oxyhaemoglobin . Its average life span is of 120 days (4 months) .Everyday millions of RBCs die and trillions of RBCs are formed in the stem cells of bone marrow through the process of Leucoposis .

Answer

Introduction:
One of the essential components of human blood is haemoglobin, a protein responsible for transporting oxygen from the lungs to various tissues and organs throughout the body. It is found within a specific type of blood cell known as red blood cells or erythrocytes. Red blood cells play a vital role in maintaining the oxygen-carrying capacity of the blood.

Red Blood Cells and Haemoglobin:
Red blood cells are unique cells that lack a nucleus and other organelles, enabling them to carry more haemoglobin. Haemoglobin is a complex molecule composed of four protein chains called globins, along with iron-containing heme groups. Each heme group can bind to one molecule of oxygen, allowing a single red blood cell to carry approximately one billion molecules of oxygen.

Life Span of Red Blood Cells:
The average life span of red blood cells is approximately 120 days, although this can vary slightly between individuals. The life cycle of red blood cells consists of several stages:

1. Production: Red blood cells are continuously produced in the bone marrow through a process called erythropoiesis. Stem cells in the bone marrow differentiate into immature red blood cells, which then mature and enter the bloodstream.

2. Circulation: Once released into the bloodstream, red blood cells circulate throughout the body, delivering oxygen to tissues and collecting carbon dioxide, a waste product of cellular respiration.

3. Removal: As red blood cells age, they become more fragile and less flexible. The spleen and liver help filter and remove old or damaged red blood cells from circulation. Macrophages, specialized cells of the immune system, engulf and break down these cells, recycling their components.

4. Replacement: To maintain a constant supply of red blood cells, the body continuously produces new ones to replace those that are removed. The hormone erythropoietin, produced by the kidneys in response to low oxygen levels, stimulates red blood cell production.

Conclusion:
In summary, red blood cells are responsible for carrying haemoglobin, which in turn transports oxygen throughout the body. Their average life span is approximately 120 days, during which they undergo production, circulation, removal, and replacement. Understanding the life cycle of red blood cells and their role in oxygen transport is crucial for maintaining overall health and well-being.

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