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

Determine the appearance of a plant cell, Determine the appearance of a pla...

Determine the appearance of a plant cell when water is plentiful? When water is plentiful, the central vacuole expands. The other organelles are pushed against the plasma me

What are the attribute of amylase inhibitors, What are the attribute of amy...

What are the attribute of amylase inhibitors? This has been attributed to a number of reasons, Let us see how these inhibitors act. The inhibitor forms a complex with amylase,

Osmotic and ionic regulation, Osmotic and Ionic Regulation The  ammono...

Osmotic and Ionic Regulation The  ammonotelism, ureotelism and uricotelism are the adaptations of the animals for the removal of toxic nitrogenous wastes and thereby maintain

Explain biochemical investigation, Explain Biochemical investigation Bi...

Explain Biochemical investigation Biochemical  investigations:  These help  to  reveal nutrients and metabolites in blood and /or urine, and/or faeces that indicate an infectio

What is panoramic x-ray, What is Panoramic X-Ray This is one of the mos...

What is Panoramic X-Ray This is one of the most vital radiological techniques in planning placement of dental implants. Not only will it give you the complete picture of the pe

Complications of making a definite classification, Assume for this question...

Assume for this question that we are discussing a rare human disorder. Describe as detailed as possible the characteristics of this disorder if it is: autosomal dominant autosomal

Explain kingdom plantae, Kingdom Plantae The kingdom plant are includes m...

Kingdom Plantae The kingdom plant are includes multicellular eukaryote organisation with photosynthetic nutrition. Typically cell has cellulose wall, sap vacuole, plastids and .

What are some examples of parasitism, Q. What are some examples of parasiti...

Q. What are some examples of parasitism? The Classical instances are the parasites of humans (host), like the trypanosome that causes Chagas' disease, the HIV virus (AIDS), the

What is sulphonylureas, Q. What is Sulphonylureas? Sulphonylureas: Tolb...

Q. What is Sulphonylureas? Sulphonylureas: Tolbutarnide is the mildest and its effect remains for 8 hours hence 2-3 doses need to be taken. Another drug chlorpropamide needs on

Mammalian lungs - respiration, Mammalian Lungs - Respiration In this w...

Mammalian Lungs - Respiration In this we will study mainly mammalian lungs as it is the best representative of a respiratory surface adapted for terrestrial respiration. For t

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