Question

“2. How is new blood made? “

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“3. What is the main function of platelets? “

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“4. Describe how the body stops bleeding. “

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“5. Sickle cells are named so because of their characteristic shape. What problems can this shape cause? “

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“6. Explain how the absence of a nucleus affects a red blood cell’s life span. “

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Answer 1

2. The bone marrow produces stem cells which are the building blocks that the body uses to make the different bloodcells such as red cells, white cells and platelets. The erythropoietin sends a message to the stem cells telling more of them to develop into red blood cells, rather than white cells or platelets.

3.  Formation of blood clots, which prevents from bleeding.

4. The body stops the bleeding by the process of coagulation. Platelets plays a role in the formation of coagulation and stoppage of bleeding. The Proteins in the blood called clotting factors work to form a clot.

5. These sickle shaped cells get stuck together easily, and block off small blood vessels. When blood can't get to where it should, it can lead to pain and organ damage.

6. Losing the nucleus enables the red blood cell to contain more oxygen-carrying hemoglobin, thus enabling more oxygen to be transported in the blood and boosting our metabolism.