Question

question 20
1 pts
the lymphatic system, like the circulatory system, is a closed circuit.
true
false

question 21
1 pts
the size of lymph nodes varies from ____ mm to more than ____ mm in diameter.
1; 20
10; 35
20; 45
30; 65

question 22
1 pts
which of the following is not a lymph organ?
thymus
spleen
pancreas
tonsils

Explanation:

Question 20

The circulatory system is a closed circuit. However, the lymphatic system is an open system. Lymphatic capillaries are open - ended, allowing interstitial fluid to enter the lymphatic vessels.

Lymph nodes vary in size. The typical range of lymph node diameters is from about 1 mm (small, pea - sized in some cases) to more than 20 mm (in cases of inflammation or disease, they can be larger).

The thymus is involved in T - cell maturation (a lymphoid function), the spleen filters blood and is part of the lymphatic - immune system, and tonsils are lymphoid tissues. The pancreas is an endocrine (produces hormones like insulin) and exocrine (produces digestive enzymes) gland, not a lymph organ.

Answer:

False

Question 21