Category: Physiology

The immune system has specialized cells called white blood cells that recognize foreign materials in the body and respond. The number of white blood cells in the blood can increase during an immune response. These cells travel through the circulatory system and the lymphatic system to an injured or infected area of the body. White…

A human body has an inbuilt immune system comprising of different parts which work together by defending against the disease-causing microorganism. Hence it is referred to as the body’s best defensive system. This system functions against infringing microorganisms and keeps us healthy. Sometimes foreign materials, manage to invade successfully. When this happens, the body depends…

The nervous system is a complex network of nerves and cells that perform three overlying functions of sensory input, integration, and motor output. This process is generally the same even at a very primitive level of the nervous system. Neurons are the cells which actually carry through signals, whereas glial cells provide supporting structures and…

The endocrine system is an integration system influencing the metabolic activities of cells. It functions through hormones – chemical messengers synthesized by endocrine glands namely – hypothalamus, pineal, pituitary, parathyroid, thyroid, gonads, and adrenals. Hormones – They are the chemical substances produced by the endocrine glands that control the metabolic functions of other cells. Mechanisms of Hormone Action…

Physiology is the study of the characteristics and mechanisms of the human body. Cells are the basic unit of life and approximately 100 trillion cells make up the typical human, each specially adapted to perform one or a few particular functions. Nearly 25 trillion red blood cells function by transporting oxygen from the lungs to…