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 nervous system includes: (i) A central nervous system comprising the brain and spinal cord, (ii) A peripheral nervous system consisting of cranial and spinal nerves arising from the brain and spinal cord respectively and (iii) An autonomic nervous system made of two ganglionated sympathetic nerves. The autonomic nervous system is often regarded as a part of the peripheral nervous [...]
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 [...]