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

Infectious bovine rhinotracheitis (ibr), Infectious bovine rhinotracheitis ...

Infectious bovine rhinotracheitis (IBR) The disease is caused by a Bovine Herpesvirus -I belonging to the family Herpesviridae and subfamily Alphaherpesvirinae. It is a DNA vir

What are uses of hydrocolloids for health, Uses of Hydrocolloidsfor health ...

Uses of Hydrocolloidsfor health Hydrocolloids, together with other dietary fibres are increasingly being seen as contributing to a number of health effects. Some of the hydroco

Explain iron uptake by cells, Explain Iron Uptake by Cells? Iron partic...

Explain Iron Uptake by Cells? Iron participates in a large number of biochemical reactions. However, for iron to perform any function, it first needs to be taken up by the cell

Importance of inherited characteristics in their explanation, QUESTION ...

QUESTION Behaviourists underestimate the importance of biological factors such as the inherited factors, by emphasizing the simple approach of Stimulus-Response to explain beha

Discuss about impermeable membrane, An impermeable membrane separates one l...

An impermeable membrane separates one liter of a 0.01 M glucose solution in water in the left compartment from one liter of a 0.1 M glucose solution in water in the right compartme

Pain - criteria for endosteal implants, Q. Pain - criteria for endosteal im...

Q. Pain - criteria for endosteal implants? Pain and tenderness are subjective criteria and depend on patient's  interpretation of the degree of discomfort. Pain is defined as u

Explain the proteus - characteristics of bacteria, Explain the Proteus - Ch...

Explain the Proteus - Characteristics of Bacteria? It is gram negative, non-sporulating rod, which is characterized by rapid motility (peritrichous flagella) and swarming type

Explain highly active antiretroviral therapy, Highly active antiretroviral ...

Highly active antiretroviral therapy (HAART) - The treatment of HIV infection requires combination therapy known as highly active antiretroviral therapy (HAART) along with inte

Heat exchangers, Normal 0 false false false EN-IN X-N...

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

What structure of the eye produces tears, Q. What structure of the eye prod...

Q. What structure of the eye produces tears? Lachrymal gland, which is a part of larger lachrymal apparatus, produces tears that flow over anterior surface of the eye. Most of

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