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 gluconeogenesis, What is gluconeogenesis? Highlight its significance...

What is gluconeogenesis? Highlight its significance giving any two examples Gluconeogenesis (i.e synthesis of new glucose) is the synthesis of carbohydrate from non-carbohydrat

Explain the phases of swallowing process in dysphagia, Explain the Phases o...

Explain the Phases of swallowing process in Dysphagia? i) Oral Phase: In this, food is placed in the mouth, mixed with saliva, chewed if required and formed into a bolus by t

Medicinal value - conservation of wildlife, Medicinal Value - Conservation ...

Medicinal Value - Conservation of Wildlife About 40% of all drugs used throughout the world have active ingredients extracted from plants and animals. The world-wide annual sa

What are the major types of lipids, Q. What are the major types of lipids? ...

Q. What are the major types of lipids? The main types of lipids are phospholipids, triglycerides (fats and oils), waxes and steroids.

Excretory organs, classification of excretory organs in helminthes, nermato...

classification of excretory organs in helminthes, nermatodes, annelids, molluscs, arthropods and echinodems

Horse diseases-horse-pox, Horse-pox Horse pox is a benign disease chara...

Horse-pox Horse pox is a benign disease characterized by the typical pox lesions on the lower limbs or around the muzzle and buccal mucosa. This is a rare disease, caused by a

Explain about the fermentation - methods of food processing, Explain about ...

Explain about the Fermentation - methods of food processing? In contrast to other preservation methods, multiplication of microorganisms and their metabolic activities are enco

Describe the effects of the failure of the pancreas, (a) Name the condition...

(a) Name the condition and (b) describe the effects of the failure of the pancreas to produce sufficient-insulin. (c) How is this condition treated? .

Protection of plants against toxic substances, Protection of Plants against...

Protection of Plants against Toxic Substances Plants produce several toxic substances themselves and may also encounter the ones produced by other plants or present in the env

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