Questions in Morphology of Animals

Select	Question
	A frog must swallow air to expand the lungs because frog
	In frog, glottis is controlled by muscles of
	The lungs in frogs are
	In frog, respiration occurs by
	In which of these animals, skin serves as an accessory organ of respiration
	In frog, cutaneous respiration takes place
	The epithelial lining of respiratory system in frog is derived by
	RBCs are nucleated in
	Heart of frog differs from that of man by presence of
	The sinus venosus of frog is located on