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

Transferring the patient form icu to ward, Transferring the Patient form IC...

Transferring the Patient form ICU to Ward The patient is made to ambulate in ICU before shifting to ward . vitals are stabilized. The ward nurse is explained the pa

Explain the pour plate method, Explain the Pour Plate Method Isolated c...

Explain the Pour Plate Method Isolated colonies can also be obtained by pour plate method. The method involves mixing of small volume of microbial suspension with molten nutrie

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

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

What are plasmids, What are plasmids? What is the importance of plasmids fo...

What are plasmids? What is the importance of plasmids for the recombinant DNA technology? Plasmids are circular fragments of DNA that are accessories to the major bacterial DNA

Define the thin and thick filaments of a sarcomere, When the overlap betwee...

When the overlap between the thin and thick filaments of a sarcomere in a skeletal muscle is decreasing, A. the total length of the I band is increasing in the sarcomere. B.

PHYLUM MOLLUSCA, how we attempt a question of phylum mollusca in exame?

how we attempt a question of phylum mollusca in exame?

Applications of computers in medical and nursing, Applications of Computers...

Applications of Computers in Medical and Nursing Establishment As computers are heavily used for storing and retrieving data the application can be administrative, clinica

What are ions, What are ions? What are the two types of molecules into whic...

What are ions? What are the two types of molecules into which ions are classified? Ions are atoms or substances electrically charged by means of loss or gain of electrons.

What are the main divisions and representing species, What are the main div...

What are the main divisions and representing species of the gymnosperms? This group of plants can be divided into conifers (pine, sequoia, cypress), that have flowers known as

Is herbivorism a form of predatism, Q. Is herbivorism a form of predatism? ...

Q. Is herbivorism a form of predatism? The Herbivorism is a form of predatism in which first order consumers feed from producers (plants or algae). For instance, fruits and bir

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