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

Discovery of insulin, Q. Discovery of insulin? The discovery of insulin...

Q. Discovery of insulin? The discovery of insulin has dramatically changed the lives of people having type 1 diabetes. With this wonder drug diabetics can lead a normal, enjoya

Peptide bond formation, Peptide bond formation is catalyzed by peptidyl tra...

Peptide bond formation is catalyzed by peptidyl transferase.  The carboxyl  end of the amino acid bound to the tRNA in this reaction and in the P site is uncoupled  from the tRNA a

Why do cells of the nephron tubules present, Why do cells of the nephron tu...

Why do cells of the nephron tubules present a great amount of mitochondria? The cells of the tubule wall have high number of mitochondria because lots of substances are resorbe

Define energy requirement for cancer patients, Define Energy Requirement fo...

Define Energy Requirement for Cancer Patients? It must be clear to you that cancer imposes increased energy demands because of the hyper-metabolic state of the disease process

Explain crossing over in genetics, Explain Crossing Over in genetics? C...

Explain Crossing Over in genetics? Crossing over is when the arms of homologous chromosomes exchange segments (and therefore genes) with each other. Recall that one of the homo

How can you describe the homeostasis, Q. What is the homeostasis? What are ...

Q. What is the homeostasis? What are the sensors, effectors and controllers of homeostasis? Homeostasis comprises the processes by which the organism maintains extracellular an

Mitosis / Meiosis, Why must our cells duplicate the DNA molecules before t...

Why must our cells duplicate the DNA molecules before they divide in Mitosis? Why do chromosomes condense by wrapping around the histone protiens durning the cell cycle?

Drowning - paediatric emergencies, Drowning: Drowning is a cause of a...

Drowning: Drowning is a cause of accidental death  in children Accidental drowning may occur because children  do not  have adequate protective supervision.  It may be defined

Explain the meaning of protein deficiency, Explain the Protein Deficiency? ...

Explain the Protein Deficiency? One of the most common nutritional disorders in the world today is the deficiency of protein. Both adults and children are affected, as the popu

Define mobilization of bone calcium and phosphorous, Define Mobilization of...

Define Mobilization of bone calcium and phosphorous? It is now firmly established that vitamin D 3 is metabloized first in the liver to 25-hydroxyvitamin D (25 OH- D) (calcicl

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