Amniotic_sac, Amniotic_sac Information, Amniotic


Tina Canaris, Nassau Real Estate Bellmore Homes for Sale, Bellmore Houses, Bellmore Broker
California PTA, Services and Information at PTAIWORLD.COM If you are interested in Texas PTA, Harper Valley PTA or any other country PTA, here is the right place for you.
public health, health department, Food safety haccp, food safety, schizophrenic

This article does not cite any references or sources. (July 2007)
Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed.

Amniotic sac

A drawing of the amniotic sac from Gray\'s Anatomy.

The amniotic sac opened during afterbirth examination.
Dorlands/Elsevier	s_01/12716695

The amniotic sac is the sac in which the fetus develops.

Some sources consider it to be equivalent to the amnion,amnion at eMedicine Dictionarys_01/12716695 at Dorland\'s Medical Dictionary, while other sources consider it to consist of the amnion and the chorion.^{[citation needed]}

It is also called the amniotic bubble because of its resemblance to a bubble.^{[citation needed]}

When in the light, the amniotic sac is shiny and very smooth, but too tough to pierce through.

Amniotomy

An artificial rupture of membranes (ARM), also known as an amniotomy, may be performed by a midwife or obstetrician. This is usually performed using an amnihook and is intended to induce or accelerate labour.

Diversity

The presence of the amnion identifies humans as amniotes, along with reptiles, dinosaurs, birds, and other mammals, but not amphibians nor fishes.

Amniotic fluid

Amniotic fluid is the watery liquid surrounding and cushioning a growing fetus within the amnion. It allows the fetus to move freely without the walls of the uterus being too tight against its body. Buoyancy is also provided.

References

External links

http://healthcare.utah.edu/healthinfo/adult/Pregnant/anatomy.htm

v • d • e Developmental biology > Human embryogenesis (development of embryo) and development of fetus (some dates are approximate - see Carnegie stages and a timeline)
Week 1	Fertilization - Egg activation - Zygote - Cleavage - Morula - Blastula (Blastomere) - Blastocyst - Inner cell mass
Week 2	Bilaminar disc (Hypoblast, Epiblast)
Week 3 (Trilaminar embryo, germ layers)	Archenteron/Primitive streak (Primitive pit, Primitive knot/Blastopore, Primitive groove) - Gastrula/Gastrulation - Regional specification Ectoderm: Surface ectoderm - Neuroectoderm - Somatopleure - Neurulation - Neural crest Endoderm: Splanchnopleure Mesoderm: Chorda- - Paraxial (Somite/Somitomere/Sclerotome/Myotome/Dermatome) - Intermediate - Lateral plate (Intraembryonic coelom, Splanchnopleure/Somatopleure)
Extraembryonic/uterus	Trophoblast (Cytotrophoblast, Syncytiotrophoblast) Blastocoele - Yolk sack/exocoelomic cavity - Heuser\'s membrane - Extraembryonic coelom - Vitelline duct Umbilical cord (Umbilical artery, Umbilical vein, Wharton\'s jelly) - Allantois Placenta - Decidua (Decidual cells) - Chorionic villi/Intervillous space - Gestational sac (Amnion/Amniotic sac/Amniotic cavity, Chorion)
Histogenesis	Programmed cell death - Stem cells - Germ line development
Organogenesis	Limb development: Limb bud - Apical ectodermal ridge/AER other structures: Eye development - Cutaneous structure development - Heart development - Development of the urinary and reproductive organs

v • d • e Pregnancy
Conception	Assisted reproductive technology • In vitro fertilisation
Detection	HCG pregnancy strip test • Obstetric ultrasonography • Pregnancy test • Prenatal diagnosis • 3D ultrasound
During pregnancy	Amniotic fluid • Amniotic sac • Amniocentesis • Chorionic villus sampling
Pregnancy complications	Diabetes mellitus and pregnancy • Ectopic pregnancy • Miscarriage • Molar pregnancy
Birth preparation	Lamaze
Childbirth	Midwifery • Home birth • Labor and Delivery

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia

Amniotic_sac

Contents

Amniotomy

Diversity

Amniotic fluid

See also

References

External links