21.4 Essay Questions 1) Explain why lymph from the right upper limb is drained into vessels on the right side of the neck, whereas lymph from the right lower limb is drained into vessels on the...

21.4 Essay Questions

1) Explain why lymph from the right upper limb is drained into vessels on the right side of the neck, whereas lymph from the right lower limb is drained into vessels on the left side of the neck.

2) Identify and describe the functions of the lymphatic system.

3) How does the structure and the function of lymph-collecting vessels compare to those of veins? What tunics do they have in common?

4) Patients often complain to their physician of "swollen glands" in their neck. What is the proper name of these "glands," and what is the significance of their swelling?

5) Describe the process of T cell activation and the significance of the blood-thymus barrier.