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

Monohybrid cross, why does the monohybrid always result in a 1:2:1 ratio?

why does the monohybrid always result in a 1:2:1 ratio?

Anaerobic lagoon system, A n a e r o b i c lagoon system This s...

A n a e r o b i c lagoon system This specific system of liquid manure handling is restricted to organized dairy farms, where the flushed manure is directed into an anae

Echinoderms, What is the classification scheme for echinoderms?

What is the classification scheme for echinoderms?

Procaryotic structure and diversity, Procaryotic Structure and Diversity ...

Procaryotic Structure and Diversity The first organisms which did not have well defined nucleus, called procaryotes, (pro = earlier, caryon = nucleus) were probably anaerobic a

Define the cell structure and function, Cell structure and function All...

Cell structure and function All organisms, whether simple or complex, plants or animals. are composed of cells. For example, a bacterium or an amoeba is made up of just one cel

ANIMAL KINGDOM , CLASSIFICATION OF PHYLUM PLATYHELMINTHES..

CLASSIFICATION OF PHYLUM PLATYHELMINTHES..

Explain gellan gum, Explain Gellan Gum Gellan is an exopolysaccharide c...

Explain Gellan Gum Gellan is an exopolysaccharide consisting of  β-D-glucose,  β-D-glucuronic acid,  α-L-rhamnose with acetate and glycerate groups, produced by the bacterium S

Classification of enzymes, Classification of Enzymes : Enzymes are clas...

Classification of Enzymes : Enzymes are classified  into the following six main categories in according with  the nature of reaction the catalyze: 1.      Oxidoreductases

Adrenal gland, ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) - ...

ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) - These are paired structures located on the top of the kidneys. Each adrenal gland has two parts external adrenal cort

Stress - responses of plants to stress, Stress - Responses of Plants to Str...

Stress - Responses of Plants to Stress Let us recall what happens within the natural communities occupying the same habitat. The relative location of two plants may place them

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