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

Define the symptoms of dry beriberi, Define the Symptoms of Dry beriberi? ...

Define the Symptoms of Dry beriberi? Early symptoms are similar to those found in wet beriberi. The muscles become progressively wasted and weak and walking becomes difficult.

Human impact on environment, questions and answers on human impacts on envi...

questions and answers on human impacts on environment

Types of environmental pollution, There are several kinds of pollution, mai...

There are several kinds of pollution, main among them are as follows:

Define stress factors - etiological risk factors in cancer, Define Stress F...

Define Stress Factors - Etiological Risk Factors in Cancer? Emotions playing a part in malignancy are not a new idea. But these relationships are extremely difficult to measure

Issues impacting health and development -inefficiency, Normal 0 ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Definition of probiotics and prebzotics, Definition of probiotics and prebz...

Definition of probiotics and prebzotics? An early definition of probiotics is 'organisms and substances which contribute to intestinal microbial balance'. Later the word 'subst

Difference between diabetes mellitus and diabetes insipidus, Q. What is the...

Q. What is the difference between diabetes mellitus and diabetes insipidus? What are the characteristic signs of diabetes insipidus? Diabetes mellitus is the disease caused by

Functions of insulin, Following are the functions of Insulin: 1) Insulin...

Following are the functions of Insulin: 1) Insulin controls the level of the sugar (glucose) in the blood. 2) Insulin permits cells to use sugar (glucose) for energy. Cells c

Define the phytate and protein interaction, Define the Phytate and Protein ...

Define the Phytate and Protein Interaction? You may be more familiar with phytate's role in mineral absorption. However phytates also bind with starch and protein. Depending on

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