The main endocrine glands that have a greater role in human body are :- Pineal gland Pituitary gland Thyroid gland Parathyroid gland Thymus Pancrease Adrenal gland Ovaries Testes
The characteristics of hormones are :- Hormones are specific chemical messenger. Hormones are secrated in small amounts by endocrine glands Hormones are poured directly into the blood and carried by blood circulation. Hormones act on specific tissue or organ called target organ. Hormones are mostly proteinaceous in nature or are the steroids. Hormones immediately disappear …
These are chemical substances which are secreted from endocrine glands.
The glands which have ducts that carry their secretion to specific places in the body.
These are ductless glands which pour their secretion directly into blood .
Two main components are :- BIOTIC ABIOTIC
A network of food chains in a community is reffered to as a food web.
The transfer of materials and energy from their ultimate source in plants as producers through series of organisms each of which eats the smaller preceding one and is eaten by larger succeeding one is called Food chain.
