Question

The largest single mass of lymphatic tissue in the body is
(a)Lung
(b)Spleen
(c)Liver
(d)Kidney

Answer 1

Hint: This organ is present in the upper far left part of the abdomen, to the left of the stomach, underneath the ninth, tenth, and eleventh ribs. It is also called as the graveyard of RBCs. It is involved in the active immune response of the body.

Complete answer:
The largest single mass of the lymphatic tissue in the body is Spleen. It is located in the upper part of the belly under the ribcage. The spleen is part of the lymphatic system and is of great importance regarding the red blood cell and immune system. In humans it is about the size of a fist and is well supplied with blood.it is the primary filtering element for blood.

Additional Information: -Spleen is encased in a thick connective-tissue capsule. Inside the mass of the splenic tissue is of two types, the red pulp, and the white pulp.
-There is no separate region but they both are intermingled and are distributed throughout.
-It removes old red blood cells (erythrocytes) and plays an important role in storing and releasing certain types of immune cells that mediate tissue inflammation.
-Red pulp consists of sinusoids filled with blood and splenic rods and is responsible for the filtration of the red blood cells.
-While the white pulp is composed of nodules called Malpighian corpuscles which are composed of B-lymphocytes and T-lymphocytes.

So, the correct answer is, ‘Spleen.’

Note: In humans, about 240 ml of the red blood cells are held inside the spleen and are released in case of hypovolemia (volume depletion, a state of abnormally low extracellular fluid) and hypoxia (a condition where the body is deprived of an adequate supply of oxygen in the tissue).