TORSION AND DETORSION IN MOLLUSCA

Written by Sunday, 11 February 2018 14:35
TORSION   Torsion is a process in which the viscero-pallium rotates anti-clockwise through 180° from its initial position during larval development. So that the mantle cavity, with its pallial complex,…

PROCESS OF FORMATION OF PEARL IN MOLLUSCS

Written by Tuesday, 06 February 2018 19:42
The “pearl” is literally formed by the mantle epithelium, which becomes deposit around any external body or particles, these external particle or body invade in between the shell and mantle…
Lizard, bird and rabbit all these three animals come under the group amniota. The taking away of nitrogenous un wanted waste products from the body is called excretion. If excretion…
Kidneys are the major excretory organs in all vertebrates. Some other organs such as lungs, gills, liver, intestine and skin also remove certain waste materials besides their normal functions. These…
Calotes is a cold blooded (poikilothermic) and terrestrial garden lizard. Pigeon is a ward blooded bird adapted for aerial mode of life. Rabbit is warm blooded and a herbivorous mammal…

COMPARATIVE ANATOMY: VENOUS SYSTEM OF FROG AND FISH

Written by Wednesday, 15 July 2009 02:54
Scoliodon commonly called as shark fish is a poikilothermic (cold blooded) animal. It is cartilaginous fish. Rana (frog) is also poikilothermic and amphibious animal. The circulation of blood in vertebrates…
Calotes is  called as garden lizard. It is a poikilothermic terrestrial reptile. Columba is commonly called as pigeon, being a bird it is  adapted for aerial mode of life. Oryctolagus…
Scoliodon ( Shark) is a poikilothermic animal. It is a cartilaginous fish. Frog ( Rana) is a cold blooded and amphibious animal. The circulation of blood is carried by closed…
Calotes is a poikilothermic terrestrial lizard. Columba is pigeon adapted for aerial mode of life. Oryctolagus is an herbivorous mammal.   Both pigeon and Rabbit are warm blooded animals. Heart,…
Scoliodon is a poikilothermc and cartilagenous fish. Rana is also poikilothermic and amphibious animal. In the circulatory system the heart is the most important organ. The blood vascular system in…
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