These are minute biconcave disc-like structures, flat in the centre and thick and rounded at the periphery.

What are they?

Hormones

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WBCs

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Antibodies

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RBCs

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Solution

The correct option is D
RBCs

Red blood cells (RBCs) are made inside your bones, in the bone marrow. Their small size plus the concavities on either side provide a large surface area which makes them very efficient in absorbing oxygen. Haemoglobin is the protein inside red blood cells that carries oxygen.

Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale.

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Similar questions

These are minute biconcave disc-like structures, flat in the centre, thick and rounded at the periphery.

Which of the following is/are true about ABO blood antigens?

1. They are present on the mitochondrial surface of WBCs.

2. They are found free-floating in the cytoplasm of WBCs.

3. They are present on the surface of RBCs.

4. They are present in the nucleus of RBCs.

Which of the following is/are true about ABO blood antigens?

1. They are present on the mitochondrial surface of WBCs.

2. They are found free-floating in the cytoplasm of WBCs.

3. They are present on the surface of RBCs.

4. They are present in RBC cytoplasm.

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