The below mentioned article provides a study note on integument in mammals. The integument or skin in mammals as well as in all vertebrates is continuous with the mucous membrane of mouth, rectum, urinogenital organs, nostrils and eyelids. The skin is made up of two distinct and embryo-logically different layers. The outer layer is epidermis and it is ectodermal in [...]
The below mentioned article provides a study note on cetaceans. Cetaceans are true aquatic mammals. There are two lineages among extant cetaceans. One lineage is Mysticeti which includes baleen whales, and the other lineage is Odontoceti that contains the toothed whales (dolphins, porpoises and other toothed whales). The baleen whales are mainly zooplankton feeders (Zooplanktonophagous) and filter their food through [...]
The upcoming discussion will update you about the difference between mullerian duct and wolffian duct. Difference # Mullerian Duct: 1. The pronephric duct acts as a female genital duct and is known as Mullerian duct or oviduct. 2. It is found in all female vertebrates (except cyclostomes). In the males, it degenerates. 3. In the female elasmobranchs both Mulleirian and [...]