B poaches its aelative belire sia puberty 32 The single D co

B poaches its aelative belire sia puberty. 32. The single D) collection oflymploidtisaac in adult is in leen. the body localed the E) lymph nodes. Nonspecific defenses include B) physical barriers. All of the

Solution

29. D

T cells are derive their names from the organs in which they develop. So, T cells develop in the thymus.

30. A

B cells are activate in the secondary lymphoid organs such as spleen, lymph nodes, tonsils and appendix.

31.C

Spleen contains two main types of tissues. White pulp and red pulp. White pulp contains large aggregration of lymphatic tissue made up of white blood cells. Red pulp made up of blood filled cavities.

32.D

Spleen is located in the upper left part of the abdomen below the ribcage. It is part of the lymphatic system and protect the body.

33.E

They are two types of defences. Specific and nonspecific. Nonspecific includes physical and chemical barriers. Physical barriers like skin,mucous membrane and inflammatory responses, interferons, phagocytic cells etc.