General Knowledge - Biology - Discussion

Hormones are chemical substances secreted by the endocrine gland usually in minute quantities into the blood stream or initiated by external stimuli as in plant and also in animal hormones are very important and there bring about growth and development as in plant and animals.

Example of animal hormone are the pituitary gland gonad gland thyroid gland adrenaline parathyroid gland and in plant cytokinins gibberellin etc.

Hormone play a imp. Role in both plant and animal.

In human all activities during growth made by hormones. Their are so many hormones secreted by verius gland. And every hormones play there own role during development.

Hormone is a protein (linked with peptide bond) that are secreted from the body time to time on requirement for the body.

Ductless glands means the released hormones have no duct or stream they enter in to blood directly.

Hormones are biochemical substances produce in minute quantity by ductless glands.

There are different hormones for different activity.

Hormones are steroid proteins.

What are the ductless glands?