Question

C. Write 'true' or 'false'. If false, write the correct statement.
1. RBCs are produced within the bones.
2. We have many more RBCs than WBCs.
3. Platelets have no nucleus.
4. WBCs help in the clotting of blood.​

Answer 1

Explanation:

1. True, Rbcs are formed in long bones of bone RED BONE MARROW present in soft bone.
2. yes we have more RBCs than WBCs in our body the ratio of tbcs and wbcs is 1:600 in our body
3. true platlets does not have nucleus because both platlets and rbcs are formed by RED BONE MARROW with the help of process named heimopoises
4. false , wbcs does not help in clottibg of blood it is done by platlets present in our blood with help of hormone prothrombin and fibriogen

Answer 2

Answer:

Hey friend!!

The answers are 1. True, 2. True, 3. True, 4. False.

Explanation:

1. True. Red blood cells are formed in the red bone marrow of bones. Their job is to transport oxygen to the body's tissues in exchange for carbon dioxide, which is carried to and eliminated by the lungs.

2. True. RBCs are produced around 2 million per second and WBCs are produced comparatively less in number. A number of RBC present is 5 million in every cubic mm of blood, while in WBC it is 3000-7000 in every cubic mm of blood. Formation of RBC is called as Erythropoiesis, while Leucopoiesis is the term used for the WBC formation.

3. True. The nucleus is present in cells that divide or continue to transcribe new genes into RNA and ultimately translate them into protein. Platelets are shed from larger cells called megakaryocytes and have all the proteins and chemicals they need for their entire life, so no need for a nucleus.

4. False. Blood clotting, or coagulation, is an important process that prevents excessive bleeding when a blood vessel is injured. Platelets (a type of blood cell) and proteins in your plasma (the liquid part of the blood) work together to stop the bleeding by forming a clot over the injury.

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