A) podocytes
B) choanocytes
C) pinocytes
D) nephrocytes
Correct Answer: A
Solution :
Kidneys are a pair of reddish brown slightly flattened, bean shaped organs present in the lumber region along the dorsal wall, one on either side of vertebral column. Bowmans capsule is blind cup shaped end of uriniferous tubules which has a double wall of thin walled flattened cells. The outer wall is called parietal layer, while the inner wall is called visceral layer. This layer is made up of specialized epithelial cells called podocytes. Choanocytes or collar cells are characteristic of Porifera. They were discovered by Clarke. They are uniflagellate and collared. The beating of their flagella creates water currrent. Pinocytes are flat cells with central bulge and narrow edges. They are modified to form contractile myocytes around oscula and occassionally ostia.
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