Define the following:
(a) Exocrine gland,
(b) Endocrine gland,
(c) Hormone.
Answers
Here's the Answer
a) Exocrine gland is a gland that pours its secretion on the surface or into a particular region by means of ducts for performing a metabolic activity, e.g., sebaceous glands, sweat glands, salivary glands and intestinal glands.
(b) Endocrine gland is an isolated gland (separates even from epithelium forming it) which secretes informational molecules or hormones that are poured into venous blood or lymph for reaching the target organ because the gland is not connected with the target organ by any duct. Therefore endocrine gland is also called ductless gland e.g. thyroid gland.
(c) Hormone is a substance that is manu-factured and secreted in very small quantities into the blood stream by an endocrine gland or a specialized nerve cell and regulates the growth or functioning of a specific tissue organ in a distant part of the body e.g insulin.
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duct conducted gland is called exocrine gland
ductless gland is called endocrine gland
the chemical substances which is secreted by endocrine gland of our body is called hormone which helps in many activities in our body