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

Explain the process of transposition of the great arteries, Transposition o...

Transposition of the Great Arteries with VSD and Left Ventricular Outflow Tract Obstruction: The presence of such a condition has to be surgically corrected title is differenc

Impulse in the sensory neurone, Explain briefly how the stimulus at the fin...

Explain briefly how the stimulus at the finger produces an impulse in the sensory neurone using the following key words. 1. Energy conversion (linked to receptor) 2. Na+ in 3. Depo

Determine the most probable mode of inheritance, In the following pedigrees...

In the following pedigrees, the disorders or traits presented follow simple patterns of Mendelian inheritance. For each trait, determine the most probable mode of inheritance, stat

What is the utility of fungi for some industries, What is the utility of fu...

What is the utility of fungi for some industries? Fungi are industrially used in the production of fermented beverage, cheese, bread etc. Some fungi are very significant for th

How does hcl also directly participate in digestion, Besides being fundamen...

Besides being fundamental for the activation of the main gastric digestive enzyme how does HCl also directly participate in digestion? With its corrosive effect, HCl also helps

Genetic abnormalities caused by recessive genes, What are some diseases or ...

What are some diseases or genetic abnormalities caused by recessive genes? Instance of recessive genetic diseases are: cystic fibrosis, phenylketonuria, albinism, galactosemia,

Explain the term light reflex - neuronal pathways, Explain the term Light r...

Explain the term Light reflex - Neuronal pathways The neuronal pathway for light reflex can be afferent and efferent. In the afferent pathway, the pupillary fibres begin in the

Hardy - weinberg law, HARD Y - WEINBERG LAW - Proposed by G.H. Hard...

HARD Y - WEINBERG LAW - Proposed by G.H. Hardy and W. Weinberg in 1908 independently. The law states "the frequency of genes or alleles in a population remains constant

Almost bacteria are anaerobic, Most bacteria are anaerobic. If a bacterium ...

Most bacteria are anaerobic. If a bacterium were to produce the same amount of ATP within a minute as a cell extracted from your skeletal muscle, what would that bacterium have to

Determine the types of blood, Determine the types of blood There are th...

Determine the types of blood There are three types of blood cells. They are Red Blood Corpuscles (RBC), White Blood Corpuscles (WBC) or leucocytes and blood platelets or thromb

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