A) Ectoderm
B) Endoderm-
C) Mesoderm
D) Blastopore
Correct Answer: C
Solution :
All systems, (except nervous system, gills and lungs), muscles, bone, heart, blood, kidney, reproductive system, coelome, lymph node, spleen, eustachian tube, adrenal cortex develop from mesoderm. Ectoderm gives rise to epidermis sudoriferous and sweet glands, enamel, salivary glands, cheeks, gums nervous system, eyes, glands etc. Endoderm gives rise to epithelium of mouth, pharynx, oesophagus, stomach, intestine, middle ear, trachea bronchi lungs, (epithelium) and epithelium of urinary bladder, vagina, prostate, bulbourethral glands, thyroid parathyroid and thymus gland etc.
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