Question

Compared to blood, lymph has
(a) More RBC and less WBC
(b) No plasma
(c) Plasma without proteins
(d) More WBC and no RBC

Answer 1

Hint: Human blood is red in color due to the presence of hemoglobin in red blood cells. Lymph is a colorless fluid with more number of white blood cells.

Complete answer:
The colorless fluid present in the body produced by lymph glands is called lymph. It is composed of leukocytes and plasma. RBCs are absent in the lymphocytes. Large plasma proteins and platelets are also absent but it contains more number of leukocytes i.e, white blood cells. They flow in lymph vessels and lymph capillaries.

Additional Information: - When compared it other tissue fluids lymph contains a very less number of nutrients and oxygen but has abundant carbon dioxide and other metabolites.
- Interstitial space is the most important site for the formation of lymph.
- As blood passes through the capillaries, some of the lymph passes through the walls of capillaries due to the hydrostatic pressure at the arteriolar end, and it enters into the interstitial spaces. This small portion of lymph contains water, solutes, and low molecular weight proteins.
- The fluid formed in the interstitial fluid is called interstitial fluid or tissue fluid.
- Due to osmotic pressure at the venular ends, most of the tissue fluid returns directly into the capillaries. Some amount of interstitial fluid passes through the lymphatic capillaries, vessels, ducts, and finally, reaches the subclavian vein. The fluid present in the extracellular space after passing into the lymph capillaries and vessels is called lymph.
So, the correct answer is ‘More WBC and no RBC’.

Note: - Lymph and lymphatic organs and glands are studied under the lymphatic system. This system represents an accessory route by which the interstitial fluid flows from tissue spaces into the blood.
-Lacteals are the lymphatic capillaries present in the intestinal villi.