Difference Between Exocrine And Endocrine Glands Pdf

difference between exocrine and endocrine glands pdf

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Endocrine is the collection of glands which produce hormones to regulate processes such as growth and development, reproduction and sexual function, metabolism and mood and sleep. These glands remove materials from the blood and process and secretes necessary product for use elsewhere in the body. Hormones produced by these glands circulate throughout the body and each hormone is marked toward specific organs and tissues.

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Mechanism of secretion in endocrine glands

Hormones play an important role in the functioning of various organs and organ systems of the body. They regulate activities of cells and organs and other processes essential to life. Hormones are chemical messengers that help our body work the way it should. In our body, Hormones are secreted by glands, which are divided into two classes: endocrine glands and exocrine glands. The endocrine glands form the endocrine system and exocrine glands form the exocrine system. Let us see how endocrine system differs from endocrine system!

Endocrine Community. Email Print Discuss. Written by Robert M. Sargis MD, PhD. Simply put, the endocrine system is a network of glands that secrete chemicals called hormones to help your body function properly. Hormones are chemical signals that coordinate a range of bodily functions.

Exocrine glands are glands that secrete substances onto an epithelial surface by way of a duct. Exocrine glands are one of two types of glands in the human body, the other being endocrine glands , which secrete their products directly into the bloodstream. The liver and pancreas are both exocrine and endocrine glands; they are exocrine glands because they secrete products— bile and pancreatic juice —into the gastrointestinal tract through a series of ducts, and endocrine because they secrete other substances directly into the bloodstream. Exocrine glands contain a glandular portion and a duct portion, the structures of which can be used to classify the gland. Exocrine glands are named apocrine glands, holocrine glands, or merocrine glands based on how their products are secreted.


Endocrine glands are the glands that secrete hormones without ducts, while exocrine glands secrete hormones through ducts. Secretory products are released to an internal organ or the external surface through a duct. Examples. Thyroid glands, parathyroid glands, pituitary glands, adrenal glands.


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A n organised collection of secretory epithelial cells. Most glands are formed during development by proliferation of epithelial cells so that they project into the underlying connective tissue. Other glands lose this direct continuity with the surface when their ducts degenerate during development. This is the parotid gland , a type of salivary gland.

Ultrastructure of Endocrine Cells and Tissues pp Cite as. The main difference between exocrine and endocrine glands is the absence of ducts in the endocrine glands. Because they have no means of conveying secretory products away from the gland, the secretion enters the circulation via the blood vessels richly distributed throughout the gland.

An endocrine gland secretes its products, for example hormones, directly into the blood.

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