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

Growth and development of multi cellular organisms, Growth and development ...

Growth and development of multi cellular organisms The normal growth and development in all multicellular organisms occur in a programmed manner. The new born babies have

Explain phylum ciliophora, Phylum Ciliophora 1) They have cilia at some...

Phylum Ciliophora 1) They have cilia at some stage in the life-cycle. The cilia are used for locomotion or creating a feeding current. 2) They feed heterotrophically usually

Calcium requirements of school children and adolescents, Determine Calcium ...

Determine Calcium requirements of school children and adolescents? Calcium requirements in children and adolescents can be calculated on the basis of Calcium accretion during g

State about glycosylated hemoglobin, Glycosylated Hemoglobin (HbA1c) Hb...

Glycosylated Hemoglobin (HbA1c) HbA1c should be done routinely for diabetic patients. It reflects the average glycemic (sugar) control over the previous few months and should b

Types of respiratory organs, Types of Respiratory Organs Respiratory o...

Types of Respiratory Organs Respiratory organs may be of the following types: Those that have respiratory surface turned out forming an evagination. These are called gi

Diversity, who is the farther of bio diversity?

who is the farther of bio diversity?

What are protein hydrolysates, What are protein hydrolysates? Proteins ...

What are protein hydrolysates? Proteins that have been treated with enzymes to break them down into amino acids or shorter peptides are referred to as protein hydrolysates.

Arthropods, what are the general characteristics of arthropods?

what are the general characteristics of arthropods?

Define structures in a vertebrate with a four-chambered, Which of the follo...

Which of the following structures in a vertebrate with a four-chambered heart would have blood with the highest oxygen concentration? And why?

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