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41.

Circulatory system of rabbit differs from that of frog chiefly in absence of:

A.	Renal portal system	B.	Hepatic portal system
C.	Superior vena cava	D.	Dorsal aorta

42.

Pulmonary aorta in embryo comniunicates with carotico-systemic aorta by a thin vessel called ductus Botalli which later closes and remains in adult as:

A.	Fossa ovalis	B.	Ligamentum arteriosus
C.	Carotico-pulmonary aperture	D.	None of these

43.

Mitral valve in mammals guards opening between:

A.	Stomach and intestine	B.	Pulmonary vein and left auricle
C.	Right auricle and right ventricle	D.	Left auricle and left ventricle

44.

Right auricle in mammalian heart receives blood from:

A.	Sinus venosus	B.	Pulmonary veins
C.	Precavals	D.	Precavals and postcavals

45.

Venus system of frog differs from that of rabbit in presence of:

A.	Renel portal system	B.	Hepatic portal system
C.	Three superior venae cavae	D.	Hepatic vein

46.

Which of the artery in frog has a receptor in form of a labyrinth:

A.	External carotid artery	B.	Internal carotid artery
C.	Both of these	D.	None of these

47.

Blood to hind limbs is supplied by:

A.	Pelvic artery	B.	Iliac arteries
C.	Hypogastric artery	D.	Vesicular artery

48.

Which of the following arteries is absent in frog:

A.	Renals	B.	Iliacs
C.	Phrenics	D.	None of these

49.

Which of the following artery supplies blood to urinary bladder:

A.	renal	B.	Posterior mesenteric
C.	Hypogastric	D.	Iliac

50.

Dorsal acrta in frog is formed by the union of:

A.	Systemic and pulmonary arches	B.	Only two systemic arches
C.	Carotid and systemic arches	D.	None of these