Embryonic membranes, Biology

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.

Posted Date: 10/3/2012 6:25:48 AM | Location : United States







Related Discussions:- Embryonic membranes, Assignment Help, Ask Question on Embryonic membranes, Get Answer, Expert's Help, Embryonic membranes Discussions

Write discussion on Embryonic membranes
Your posts are moderated
Related Questions
the characteristics of flying fish belong to pisces

Explain changes in gastrointestinal tract of infants? A full term baby has the ability to digest simple proteins, carbohydrates and emulsified fats. In first 3-4 months, the p

Some observations seen in this fever are: 1.  Massive loss of  lean body mass or muscle due to tissue breakdown (250-500 g muscle tissue is lost/day) leading to excessive nitro

Determine about the prokaryotic cell While we describe in detail the structure of a eukaryotic cell, it will be useful to examine the structural features of a typical prokaryot

What is the mode of nutrition in fish,human,amoeba,scorpian & toad

Discuss why humans not evolve with one central repository of DNA rather than having it replicated throughout the body?


PLANNING FOR EVALUATION: The need for clearly defined objectives for the evaluation process, analysis of  the need for it, systematic measures for accomplishing its purpose an

Irritability If a bright torch of light is flashed across your eyes, you close your eyes instinctively. The bright light acts as a stimulus (pl, stimuli) and closing your eyes

Q What are the fruiting bodies present in a few fungi? Fruiting bodies are structures made of hyphae that project radially from the superior portion of the peduncle of a few fu