Cell membrane: Structure and Functions

It is a protective outer covering sheath that envelopes the cell body. It is known by other name called plasma lemma and plasma membrane. It separates extracellular fluid (ECF) which is outside the cell and intracellular fluid that is inside the cell. It is a semi permeable membrane as it allows exchange of certain substances … Read more

Thyroid gland

Introduction It is situated in the neck in front of the larynx and trachea at the level of 5th, 6th, and 7th cervical and 1st thoracic vertebrae. It is highly vascular ‘H’ shaped brownish red gland. It weighs about 25 grams which is surrounded by fibrous capsule. It consists of 2 lobes, one on either … Read more

Gall bladder and biliary system

Gall bladder and biliary system

Introduction of gall bladder The gall bladder is a small pouch which is about 4 inch in size, pear shaped sac-like organ and is grey-blue in life. It is positioned in a depression under the right lobe of the liver in the upper right section of our abdomen. It is made up of an outer … Read more

Various functions of liver

Liver performs a number of functions. Due to its function, it is also called master laboratory of the body. It is an important organ for metabolism in vertebrates. A summary of its important function is as follows: 1) Secretion of bile The liver cells synthesize the constituents of bile from the mixed arterial and venous … Read more