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

Describe effects on the urinary system, Describe the effects on the urinary...

Describe the effects on the urinary system of drinking too much beer.

Explain amylose, Amylose Amylose molecules have molecular weights rangi...

Amylose Amylose molecules have molecular weights ranging from 10 4 -20 6 . Amylose can form an extended shape (hydrodynamic radius 7-22 nm) but generally tends to wind up into

After the blastula stage what is the next stage, Q. After the blastula stag...

Q. After the blastula stage what is the following stage of the embryonic development? What is the passage from blastula to the next stage called? The blastula turns into gastru

Explain unresorbable barriers - root perforation, Explain Unresorbable Barr...

Explain Unresorbable Barriers - Root Perforation MTA exhabits excellent tissue biocompatible non resorbable barrier and restorative material. It represents an extraord

What is the cytoskeleton, Q What is the cytoskeleton? What are its major co...

Q What is the cytoskeleton? What are its major constituents in animal cells? Cytoskeleton is the cytoplasmic structure that supports the cell, keeps its fixates and shape and m

#classification of parasitic protozoa.., most recent classification of para...

most recent classification of parasitic protozoa with its general characters

Advantages of metagenesis in cnidaria, Advantages of Metagenesis in Cnidari...

Advantages of Metagenesis in Cnidaria In this you have studied that a huge number of Cnidarian colonies are polymorphic and exhibit alternation of generations. This changes o

Fungi, is the have 100 nuclus ?

is the have 100 nuclus ?

Define health and feeding problems among elderly, Define Health and Feeding...

Define Health and Feeding Problems among Elderly? Malnutrition, both obesity and under nutrition, are common problems linked with elderly.  Some of the common disorders such as

Give example of ex-situ conservation, Which one of the following is an exa...

Which one of the following is an example of ex-situ conservation? 1. Wildlife sanctuary 2. Seed bank 3. Sacred groves 4. National park Seed bank

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