Which of the following decreases during aerobic exercise?

Pylangium in frog is found in

Which arterial arches are absent in a frog?

Lead concentration in blood is considered alarming if it is

Purkinje fibres are connected with impulse conducting system of

Microscopic blood vessels in the liver are called

Which of the following cation is required for the conversion of prothrombin into active thrombin by thromboplastin?

Large arteries have more elastic connective tissue and less smooth muscle, such as

The thickening of walls of arteries is called

Carotid artery supplies