Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following are mesodermal in origin? (1) Blood, bone marrow and neural tube (2) Skeletal muscles and reproductive ducts (3) Parathyroid and enamel of teeth (4) Kidney and endothelium of blood vesselsA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
Some derivatives of the primary germ layers in mammals are as follows: Ectodenn: Neural tube, neural crest, enamel of teeth, hair, nails, etc. Mesodenn: Notochord, circulatory system (blood, bone marrow, lymphoid tissue, endothelium of blood vessels, lymphatics), organs ofurogenital system (ureter, kidney, gonads, reproductive ducts), etc. Endodenn: Thyroid, parathyroid, liver, pancreas, etc.
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