Rana tigrina, the common Indian bull frog, generally lives in or near water but in rains it may be found far away from its natural habitat, the aquatic home. It lives near water probably- (i) to carry out the cutaneous respiration by keeping the skin moist as soon as it gets dry and (ii) to escape from the man and [...]
The blood vessels which carry the blood away from the heart to different parts of the body constitute the arterial system. In frog arterial system begins with the truncus arteriosus which divides into two large right and left branches or trunks. Each branch divides into three aortic arches- an anterior carotid arch, a middle systemic arch and a posterior pulmocutaneous [...]
The blood vessels which carry the blood towards the heart constitute the venous system. The venous system in frog constitutes the following main veins: Pulmonary Veins: The oxygenated blood from two lungs is returned by two pulmonary veins, which open dorsally into the left auricle after uniting with each other. Caval Veins: The deoxygenated blood from the rest of the [...]