Question

A Name the following:

1. The vein that carries oxygenated blood.
2. A lymphatic organ.
3. The protein produced by certain white blood cells in response to a foreign substance.
4. The contraction phase of the heart.
5. Iron pigment present in erythrocytes.

Answer 1

1.pulmonary veins. 2.spleen...

3.antibody 4.systole. 5.haem

Explanation: 1. Veins generally has the role carrying deoxygeneted blood but in our body we have one vein that carries oxygeneted blood ,the important fact to remember is veins take blood into the body .So the vein that carry oxygeneted blood will also carry blood into the heart from lungs and the opening of heart is the left auricle.

2. Spleen is the lymphatic organ close to armpit which helps in defence to body and produces lymph

3.antibody - antibodies are produced by cells of WBC against foreign entity called antigen.

4.systole- the stage of contracted heart is systole and relaxed heart is diastole.

5.heam - the answer is haem because haem means iron and iron imparts redness to blood plasma ,and with globin it form haemoglobin.