In this article we will discuss about the histological peculiarities of various organs. The various organs whose histological peculiarities has been discussed are: 1. Tongue 2. Spleen 3. Pancreas 4. Lung 5. Kidney 6. Adrenal 7. Testis 8. Ovary 9. Artery 10. Vein 11. Thyroid 12. Liver 13. Gastro-Intestinal Tract 14. Stomach 15. Small Intestine. 1. Tongue: Epithelium is of [...]
In this article we will discuss about the history of the classification of animals. The history of classification and naming of animals can be traced before Aristotle. Simpson (1961) and Mayr (1982) have given excellent history of taxonomic development. Mayr and Ashlock (1991) described the hisÂtory of taxonomy, and the same reflects the concept and trend in systematics. Tribal natives [...]
The following points highlight the four important species concept. The important species concept are: 1. Typological or Essentialist Species Concept 2. Nominalistic Species Concept 3. Biological Species Concept 4. Evolutionary Species Concept. 1. Typological Species Concept: According to this concept, there are a number of diversities on the surface of the earth that exist as a limited number of universals [...]