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Category Archives for "Human Physiology"

Endocrine Glands: Hormones, Functions and Disorders

There are two types of glands in the body such as endocrine glands and exocrine glands. Endocrine glands are also known as ductless glands that constitute the endocrine system. The endocrine system forms network in the body and produce hormones directly into the blood stream. Endocrine glands perform various functions in the body. They influence […]

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Thyroid Gland: Hormones, Functions and Disorders

The thyroid gland is a butterfly-shaped endocrine gland. It is brownish-red that rich in blood vessels. Vital nerves that are responsible for voice quality also pass through the thyroid gland.The thyroid gland is found in all vertebrate, but they are quite variable to shape and anatomical position. In some lower vertebrates, only thyroid follicles are […]

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Adrenal Gland: Different Parts, Hormones and Functions

The adrenal gland is one kind of endocrine gland, which is also known as a suprarenal gland. It is two in number that is placed on the upper pole of each kidney at the level of 1st lumbar vertebra. The right adrenal gland of humans is pyramidal in shape, while the left adrenal gland is […]

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Hormone, Definitions, Properties and Chemical Natures

The word ‘Hormone’ is derived from Greek word ‘hormao’ which means “I impel” or “I arouse to activity”. William M. Bayliss and Ernest H. Starling (1904) termed that important chemical substance as hormone though it was first proposed by W. B. Hardy. In animal physiology, it denotes a specific substance which is effective in a very […]

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Food and Nutrition

Every day we eat food to live. Food is any substance that is consumed by animals to produce energy and aids in the body’s nutrition and growth. It is the animal or plant origin that contains proteins, lipids, carbohydrates, vitamins, and minerals. These components are known as essential nutrients. The nutrients are taken by the […]

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Blood: Definition, Components and Functions

British physiologist William Harvey (1628) first of all expressed the plan of special type of system within the body. This system is called the blood circulatory system.  In our body, this special system perform several functions like carrying food substances, respiratory gases, excretory wastes, and control body temperature and metabolic activities, prevent infection and coordinate […]

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Lipid : Classification and Its Roles in the Living Organisms

Lipid is an organic compound of biological origin that is made up of carbon, hydrogen, and oxygen. Lipid is esters of fatty acids and glycerol of higher aliphatic acids. It is insoluble in water and soluble in fat solvents like chloroform, ether, benzene, and alcohol.Lipids comprise 0.5% of the living body. They are the naturally […]

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Carbohydrate: Definition, Classification and Its Functions

Carbohydrates are the most widely distributed compounds in both plants and animals. Plants can build up carbohydrates from carbon dioxide (CO2) by the process of photosynthesis. The living body contains 1 percent of carbohydrates. Many plants and animals contain large quantities of carbohydrates as reserve food material. They are the compounds which provide energy to […]

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