Question

15.Match the terms given under column 'A' with their functions given under column 'B' and select the answer from the options given below:

Answer 1

A. Lymphatic system: It permeates the entire body. It drains excess tissue fluid from the extracellular spaces back into the blood.

B. Pulmonary vein: Blood takes up oxygen and becomes oxygenated. Four great veins, called pulmonary veins, two from each lung, return the oxygenated blood from the alveolar capillaries to the left auricle.

C. Thrombocytes: They found in vertebrates other than mammals. The spindle cells aid in clotting of blood like the platelets of mammals.

D. Lymphocytes: They secrete antibodies to destroy microbes and their toxins, reject grafts and kill tumour cells.

So, the correct answer is 'A-3, B-1, C- 4,D-2'.