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

What are the use of a barrier membrane is grafting procedure, What are the ...

What are the uses of a barrier membrane is grafting procedures? Uses of barrier membrane in grafting procedures : i) Help in stabilizing the graft ii) Prevents ingrowth

Multiple replicons , In the eukaryotes replication of chromosomal DNA happe...

In the eukaryotes replication of chromosomal DNA happens only in the S phase of the cell cycle. As for bacterial DNA, eukaryotic DNA is replicated     figure: The euk

Origin, What group did reproduction via sexual exchange of genetic informat...

What group did reproduction via sexual exchange of genetic information originate in?

Phylum, Are protozoan''s diploblastic or triploblastic

Are protozoan''s diploblastic or triploblastic

Explain the term trans fatty acids, Explain the term Trans fatty acids? ...

Explain the term Trans fatty acids? Plant derived fats and oils contain cis-fatty acids. You may recall reading about the cis and trans isomers in the Nutritional Biochemistry

Study of human age pyramids, Q. What are the analyses provided by the study...

Q. What are the analyses provided by the study of human age pyramids? The study of human age pyramids able to provide the following analyses, proportion of individuals at an ec

Mollusca, in molluscathe foot is used for (capturing locomotion or both

in molluscathe foot is used for (capturing locomotion or both

What is peristaltic movement role in human digestion, Q. What are peristalt...

Q. What are peristaltic movements? What is their role in human digestion? Peristalsis is the process of synchronized contractions of the muscular wall of the digestive tube, Pe

Fields in ecology, Ecology is divided into two fields:    (a)Autecology...

Ecology is divided into two fields:    (a)Autecology     (b) Synecology   (a)  Autecology: it deals with life history, population dynamics, behavior etc of a single

Tunnel subvalvar stenosis, Tunnel Subvalvar Stenosis :  This variety ...

Tunnel Subvalvar Stenosis :  This variety is less common and extends from sub aortic area for a variable length of 10-30 mms (tunnel stenosis). In the severe variety, the tun

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