Endocrine organs, Biology

Assignment Help:

Endocrine Organs

Endocrine organs, as explained earlier are those organs or tissues, which release chemical substances directly into blood stream. Not like exocrine glands they do not have ducts to carry their secretion, and are hence considered ductless glands. Table lists the endocrine glands of the higher invertebrate groups, the secretions they generate and the functions of the secretions. Among non-chordates neurosecretory cells (NSCs) form a significant constituent of the endocrine system.

Table: Endocrine Organs

139_Endocrine Organs.png

These are nerve cells specialised for hormone production. Thus they combine neural and endocrine properties. Apart from this, endocrine glands may arise from the nervous system, by complete modification. Corpus cardiacum of insects is one such gland. Several non-chordates have also epithelial endocrine glands derived from embryonic ectoderm, mesoderm or endoderm layers. The optic glands of cephalopod molluscs, androgenic glands and Y-organs of crustaceans, and the corpus allatum and prothoracic glands of insects are some instances. You will be studying these structures and their functions in detail. But previous to we proceed further, let us look into the concept of neurosecretion a little more elaborately, since neurosecretion plays a significant role in regulating metabolic and reproductive functions in non- chordates.


Related Discussions:- Endocrine organs

Zoology, give the discriptive account of nerilla which belongs to class a...

give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida

In which condition number of white blood cell decreases, The condition in w...

The condition in which there is a DECREASE in the number of white blood cells in humans is termed as: a) Leukocytosis (pron: lew-kO-sigh-toe-sis) b) Leukopenia (pron: lew-kO

What are the examples of homeostasis, What are the examples of homeostasis?...

What are the examples of homeostasis? Regulation of body temperature, control of blood glucose levels, the regulation of salt and water balance are the example of homeostasis

Show the valve that separates the aorta from the heart, Q. What is the valv...

Q. What is the valve that separates the aorta from the heart? What is the importance of that valve? The valve between the aorta and the left ventricle is the aortic valve. The

Pylum mollusca, Economic importance of phylum mollusca

Economic importance of phylum mollusca

The Human Inpact on the Environment, Name the four organisms which are curr...

Name the four organisms which are currently in danger of extinction because of human activities?

Explain about the macro minerals, Explain about the Macro Minerals? Pre...

Explain about the Macro Minerals? Previously we learnt about the structure, properties, deficiencies/toxicity and recommended dietary intakes of several vitamins. In this unit,

What are the digestive functions of the liver, Q. What are the digestive fu...

Q. What are the digestive functions of the liver? The liver has other digestive functions, besides making bile for release in the duodenum. The venous network that absorbs n

What are the antigen-presenting cells of the immune system, What are the an...

What are the antigen-presenting cells of the immune system? The antigen-presenting cells of the immune system, also called as APC cells, are cells that do phagocytosis and dige

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd