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

TAKHTAJANS classification, comparison between takhtajans and natural classi...

comparison between takhtajans and natural classification

What is coarctation of aorta, What is Coarctation of Aorta ? More commo...

What is Coarctation of Aorta ? More common in males (3:l). Narrowing of aorta typically located near aortic attachment of ligamenturn arteriosum or PDA. It can be a localized

In how many parts hydrocolloids be classified, In how many parts Classifica...

In how many parts Classification of Hydrocolloids Hydrocolloids, based on their solubility, thickening and gelling properties in water, are categorized into two main classes.

Determine the importance of clinical studies, Determine the importance of C...

Determine the importance of Clinical Studies The opportunity to investigate the conditions that influence stages of growth and development from gestation to infancy to early ch

Brain, What are the types of brain?

What are the types of brain?

What is continuous full thickness incision, Q. What is continuous full thic...

Q. What is continuous full thickness incision? 2. Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be u

Skeletal system - hind arm or leg bones, HIND ARM OR LEG BONES - Each l...

HIND ARM OR LEG BONES - Each leg contain 30 bones as : femur in thigh, patella in knee, tibia & fibula in the lower leg, 7 tarsals in ankle, 5 metatorsles in the sole

What is the basic morphology of a protozoan cell, What is the basic morphol...

What is the basic morphology of a protozoan cell? Protozoans are eukaryotic cells so they have organelles and structures common to this part of cell: endoplasmic reticula, Gol

Inhibition of microbes by weak acids, With the exception of those soft drin...

With the exception of those soft drinks that contain phosphoric acid, in most other acidic foods acidity is due to the presence of weak organic acids. These do not dissociate comp

What is machined implant, What is Machined implant Machined implant ha...

What is Machined implant Machined implant has irregular surface roughness from approximately 10μm grooves and ridges in the machining direction. The roughness of implants can

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