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

Explain procedure for test the presence of sugar in honey, Procedure for Te...

Procedure for Test the Presence of Sugar in Honey? 1. Mix 5 grams of honey with 5 ml ether in a mortar and pestle. 2. Decant off the ether extract into an evaporating dish.

Explain the treatment of travelers diarrhea, Treatment of travelers'diarrhe...

Treatment of travelers'diarrhea  The most common cause of travelers' diarrhea, usually a self-limited illness lasting several days, is infection with noninvasive enterotoxigeni

How many of each type of core histone, How many of each type of core histon...

How many of each type of core histone would it take to wrap the entire human genome into nucleosomes? How has evolution solved the problem of producing such a large number of prote

Macro µ nutrients, Tabulate macro & micro nutrients on the basis of -...

Tabulate macro & micro nutrients on the basis of -elements, source, synthesis site, symptoms

Which type of defense cell do viral infections, Q. Of which type of defense...

Q. Of which type of defense cell do viral infections stimulate the multiplication? The main leukocytes that generally participate and multiply in the defense against viral infe

Meaning of cellular secretion, Cell secretion is the elimination to the ext...

Cell secretion is the elimination to the exterior of substances formed by the cell (for example, hormones, mucous, sweat, etc.)

Wet and dry thermal treatment, Wet and dry thermal treatment Wet therma...

Wet and dry thermal treatment Wet thermal treatment: it is based on exposure of shredded infectious waste to high temperature, high pressure steam. It is inappropriate for the

Parathyroid gland, PARATHYRIOD GLANDS - They develop from the endode...

PARATHYRIOD GLANDS - They develop from the endoderm of the embryo. The parathyroid glands consist of four separate glands located on the posterior surface of the lobes of

Define physiologic functions of iodine, Define Physiologic Functions of Iod...

Define Physiologic Functions of Iodine? Thyroid hormone performs multiple functions as regulator of cell activity and growth. The hormone has crucial metabolic roles in the foe

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