Aquatic adaptation in animals 0

Aquatic adaptation in animals

Plants and animals inhabiting in aquatic habitat possess characteristic structural modifications that help them to live in fresh water or sea water as the case may be. The anatomical peculiarities that enable them to...

Preen gland – a special feature in birds 0

Preen gland – a special feature in birds

A characteristic feature of avian skin is the absence of sweat glands and sparse distribution of sebaceous glands. Preen gland or uropygeal gland or oil gland is a sebaceous gland situated between the tail...

Ivory – how to distinguish? 0

Ivory – how to distinguish?

Ivory is a hard, smooth, creamy or yellowish white substance obtained from mammoth, elephants, walrus, sperm whale, etc. It is composed principally of dentine that forms the tusk or teeth of these animals. The...

Tapetum – the wonderful ocular mirror 0

Tapetum – the wonderful ocular mirror

Vascular tunic or uvea of the eye comprises three portions namely the choroid, ciliary body and the iris. The choroid is generally dark brown in colour, but an extensive area above the level of...

Immunohistochemistry – an overview 0

Immunohistochemistry – an overview

Immunohistochemistry is a technique for localization of cellular or tissue constituents by using labelled antibodies through antigen-antibody interactions, which is then visualized by a marker such as fluorescent dye, enzyme, radioactive element or colloidal...