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Q. How do fishes do gas exchange?
Fishes "breath" through gills, branchiae or Gills, are highly vascularized organs specialized in gas exchange under water and present in aquatic animals (crustaceans, marine annelids, tadpoles and fishes). Gills are a respiratory organ (analogous, for instance, to lungs) containing very thin lamellae with many apparent blood vessels in direct contact with water.
In osteichthyes the gills are covered by a bony flap that protects them called as operculum, in chondrichthyes there are no opercula.
Contagious bovine pleuropneumonia (CBPP) This is a highly fatal disease of cattle and of major economic importance in certain tropical countries. It also affects buffaloes, bi
Describe Wide Split S in details? It is a persistent split that widens on inspiration to at least 60 msec. May be due to delay in P, e.g. RBBB or due to early A, as occasionall
Systems Theory - Accident Causation The systems theory established extremely strong relationship between system and accident. A properly functioning system may avoid accidents
EVOLUTION OF MAN - Mammals evolved from primitive reptiles (therapsida) in Triassic period, about 210 million years ago. Mammals existed as inconspicuous group of small
Q. What is an illustration of gene control? An elegant instance of gene control in bacteria is operon system. A cluster of genes which is responsible for synthesizing a particu
Explain Suturing - Endodontic Surgery a. Purpose of suturing: approximation of inside tissues and stabilize the flapped mucoperiosteum b. Major problem of suturing in oral t
Q. Do echinoderms have an excretory system? How is excretion done in these animals? Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
basis of genetic transplantation
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Explain what is Class Osteichthyes ? Class Osteichthyes takes its name from the Greek root "osteo," referring to bone, and "ichthys," referring to fish. The bony fish have a sk
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