Abstract:
There was no period of cessation during the six days following irradiation. This resembles the increase shown by anuran embryos before perforation of mouth, the increase in body was at the cost of the girth of tail muscles. After severe irradiation, the gastrointestinal tract is paralysed and swelled, contains a large quantity of matter. There is a shift of chloride and water from the body tissue into) gastric secretions. The weight of the content of stomach and intestine some times amounts to 10% of the body weight and the total body chloride balance becomes negative. Meanwhile, excessive loss of Na through intestinal syndrome may become immediate cause of death. In anura exchange of H0 and solutes between the body and external environments takes place in several sites. The success of balance of water regulation depends to some extent on renal excretion. The anuran pronephros develops early and is a conspicuous structure on each side of the larval body. Median dorsal glomeruli knots of capillaries rising from branches of the aorta extend freely into coelomic body. The anuran skin is relatively thin and is an important site for evaporative loss of water an,` penetration of water into the body. At the time of metanphcas complexity increases with the changes in the body from tadpole to froglet form. The fluid exchange from permeable epidermis is greatly known. The density of capillary network increases till the emergence of fore limbs, now the metamorphosis of tadpole skin starts and the larval capillaries in the corium of dermas are replaced by subepidermal capillaries of adult. Meanwhile distinctive changes occur in plasma protein. The whole body x-ray doses higher than 2000 are lethal and will allow many tadpoles to survive and complete metamorphosis.
Page(s):
27-37
DOI:
DOI not available
Published:
Journal: Journal of science, Volume: 4, Issue: , Year: 1976