Embryonic membranes, Biology

Assignment Help:

EMBRYONIC MEMBRANES -

Such animals are called amniota. Embronic membranes are of 4 types -

(i) Yolk sac -

It is formed below the embryo. It contains fluid (no yolk)

It is double layered, made up of outer mesoderm and inner endoderm. First organ to form R.B.C.

(ii) Amnion -

It encloses a fluid filled space amniotic cavity. It surrounds complete embryo.

The embryo is suspended in the amniotic cavity by an umbilical cord.

The main b.v. from the placenta reach the foetus through the umbilical cord.

Amniotic fluid is derived from the foetal kidneys & bladder i.e. it is foetal urine.

Amniocentosis is method to detect sex of foetus & chromosomal defects.

(iii) Allentoise -

A small sac., consists of endoderm inside & mesoderm outside. It is excretory in nature, stores nitrogenous waste.

977_embryonic membrane.png

391_embryonic membrane1.png

(iv) Chorion -

It completely surrounds embryo, outerly made up of ectoderm & inner of mesoderm.


Related Discussions:- Embryonic membranes

High energy fixation - nitrogen fixation, High energy fixation - Nitrogen F...

High energy fixation - Nitrogen Fixation Through cosmic radiations, lightning, volcanic activity and meteorite trails which provide the high energy needed to combine atmospher

Carbohydrates requirements for ulcerative colitis, Q. Carbohydrates require...

Q. Carbohydrates requirements for ulcerative colitis? Carbohydrates: They form the easily absorbable source of energy. Bulk-producing vegetables are restricted so as to allow b

What are prophylactic measures against hiv infection, Q. What are some prop...

Q. What are some prophylactic measures against HIV infection? The major prophylactic measures against HIV infection are: the use of condoms in sexual relations, not to share ne

Crab, What are the excretory organs of crab

What are the excretory organs of crab

Alive and something that is a living organism, Is there a difference betwee...

Is there a difference between something that is alive and something that is a living organism?

An alpha helix can be used to cross a membrane, An alpha helix can be used ...

An alpha helix can be used to cross a membrane What property do you think is common to all transmembrane regions?

What are the biological troubles, Q What are the biological troubles that m...

Q What are the biological troubles that molluscs face due to their soft body? Because molluscs have a soft body they are further fragile. They also have more complexity to supp

Describe the structure of alginate, Describe the structure of alginate ...

Describe the structure of alginate The commercially available alginates are white to cream coloured powders. 1% alginic acid solution gives a pH value of 2.9 while it is 2.3 an

Determine food sources for zinc, Determine Food Sources of Zinc? Zinc i...

Determine Food Sources of Zinc? Zinc is normally associated with the protein and/or nucleic acid fraction of foods. Thus, foods high in proteins are good sources of zinc. Lean

Define the elimination of vitamin e, Define the Elimination of Vitamin E? ...

Define the Elimination of Vitamin E? The primary oxidation product of α-tocopherol is α-tocophery quinone that can be conjugated to yield the glucuronate. This glucnronide is e

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