B-lymphocytes originate in human from:
Correct answer: C. Bone marrow
- A. Blood cells
- B. Bursa of Fabricius
- C. Bone marrow
- D. Thymus
Explanation
B-lymphocytes are cells of immune system that produced from bone marrow in human but in case of birds they are originated from Bursa of Fabricius which is a lymphoid mass
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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