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BRANCHES OF EMBRYOLOGY-
1. DESCRIPTIVE EMBRYOLOGY
This field of embryology is associated with the morphological description of different embryonic stages in the ontoge- netic development of individuals of different species. This involves the initial work of embryologists till 18th century.
2. COMPARATIVE EMBRYOLOGY
It embraces the comparative study of embryology of different animal groups.
3. EXPERIMENTAL EMBRYOLOGY
It involves all those studies that attempt to understand the various fundamental mechanism in the development of different animals, like fertilisation, Cleavage, Gastrulation, Embryonic induction, determination and differentiation.
4. CHEMICAL EMBRYOLOGY
This branch of embryology includes all those studies which employ various biochemical, biophysical and physi- ological techniques for understanding embryological events at molecular level.
5. TERATOLOGY
It is the branch of embryology concerned with the study of malformations or birth defects. The substances that cause birth defects are called tetratogens. Phocomalia (poorly developed arms child), Ectomalia (arm less child)
Organisation of Nervous System Nervous systems are composed of nerve cells or neurons and glial cells. In the latter half of the 19 th century it was strongly believed that
Define Protein Concentrates, Isolates and Hydrolysates? The first question that may come to your mind is why do we need to concentrate or isolate a protein from a product? The
The male had a female first cousin (on his father side) who died from TSD and the female had a maternal uncle with TSD. Assume this trait is very rare. 1. Calculate the probabil
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Give one example in each case of (a) a fixed joint, (b) a ball and socket joint, (c) a hinge joint. (a) The bones of the skull, the junction of pelvic gi
Name some Drugs to prvent tuberculosis Pyrazinamide can cause morbilliform rash, arthralgias and asymptomatic hyperuricemia, and blocks the hypouricemic action of allopurinol (
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defination of phyletic lineage?
Explain Zipping of the Apical Canal a. If the preparation is continued with progressively larger and stiffer file lead to : zipping perforation or tear apical foramen.
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