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

Species diversity, Species Diversity Species diversity means the differe...

Species Diversity Species diversity means the differences between species (both domesticate d and wild). It is the most visible component of biodiversity as implied by the word

Explain the before abutment connection - implant failures, Before Abutment ...

Before Abutment Connection There can be wound dehiscence, and the presence of signs of infection such as swelling, fistula, pain prior to stage to surgery. It is important t

Why is an s strain of bacteria able to cause disease, Why is an S strain of...

Why is an S strain of bacteria able to cause disease in mammals but a R strain is not? The slippery capsule stops the cells of the defence system from capturing and destroying

Which hormones stimulate glycogenolysis, Which hormones stimulate glycogeno...

Which hormones stimulate glycogenolysis? Glucagon  in liver and epinephrine  in liver  and muscle stimulate glycogenolysis.

What is pus, What is pus Pus is a residual of the inflammatory reaction...

What is pus Pus is a residual of the inflammatory reaction. It is having a mixture of fragments of dead leukocytes, infectious agents (generally bacteria) and tissues.

differences between rna and dna , Ribo Nucleic Acid contains OH group at s...

Ribo Nucleic Acid contains OH group at second carbon where as Deoxyribo Nucleic Acid lacks OH group at Second carbon.....DNA is Double standed helix whereas RNA is single stranded

Determine the occurrence of pantothenic acid, Occurrence Pantothenic acid ...

Occurrence Pantothenic acid Pantothenic acid is a ubiquitous active principle occurring in free as well as in the bound form. In the bound form, pantothenic acid is incorpor

Which amino acid can form disulfide bonds, a. Which amino acid can form dis...

a. Which amino acid can form disulfide bonds? b. Which level of protein structure do disulfide bonds affect? How? c. Cytoplasmic proteins rarely form disulfide bonds, even if they

Composting, C o m p o s t i n g It is a modification of a conv...

C o m p o s t i n g It is a modification of a conventional or solid manure handling system with anaerobic decomposition. Types of composting systems include windrow, b

Coral, 3 benefits humans get from coral

3 benefits humans get from coral

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