Question 9

The spleen removes germs from the blood.

The spleen plays a crucial role in the immune system by filtering blood and removing pathogens, making option C the correct association of structure and function.

A) Bone marrow destroys worn out red and white blood cells.

This option is incorrect because while the bone marrow is responsible for producing red and white blood cells, it does not primarily function to destroy worn-out cells. Instead, the removal of aged or damaged blood cells occurs in the spleen and liver.

B) Tonsils are where T-cells are generated and mature.

This statement is inaccurate as the tonsils are involved in the immune response but are not the site of T-cell generation and maturation. T-cells are primarily produced in the bone marrow and mature in the thymus gland.

C) The spleen removes germs from the blood.

This option accurately describes the function of the spleen, which filters blood, removing pathogens and old blood cells, thus playing a vital role in the body's immune defense.

D) Peyer's patches are where B-cells are generated and mature.

This statement is misleading. Peyer's patches are lymphoid tissues in the intestines that are involved in the immune response but do not serve as the primary site for B-cell generation and maturation. B-cells are generated in the bone marrow and mature there.

Conclusion

Option C is definitively correct as it accurately describes the spleen's primary function in the immune system. The other options misattribute functions or incorrectly describe the roles of the respective structures, highlighting the importance of understanding the correct associations in immunology.