Pylangium in frog is found in

Purkinje fibres are connected with impulse conducting system of

The neurogenic heart is found in

First heart transplant was performed by

Which arterial arches are absent in a frog?

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

A four - chambered heart is not found in

Carotid artery supplies

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

The right auricle of heart also receives a small coronary sinus and its opening is guarded by