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Mammalian embryogenesis



Mammalian embryogenesis is the process of cell division and cellular differentiation during early prenatal development which leads to the development of a mammalian embryo.

Additional recommended knowledge

Contents

Difference from human embryogenesis

Main article: Human embryogenesis

Most mammals develop similarly to homo sapiens; during the earliest stages of development, the embryo is largely indistinguishable from another mammal.

However, there are phenomenons found in human being not found in all other mammals, as well as phenomenons occurring in other mammals, but not in humans.

Humans but not all mammals

Mammals don't necessarily have the same human chorionic gonadotropin released from the embryo.

Mammals but not humans

The anatomy of the area surrounding an embryo or fetus, however, is different in litter-bearing animals compared to humans: each unborn animal is surrounded by placental tissue and is lodged along one of two long uterine horns rather than in the center of the pear-shaped uterus found in a human female.

See also

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/uterusTrophoblast (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)
HistogenesisProgrammed cell death - Stem cells - Germ line development
OrganogenesisLimb development: Limb bud - Apical ectodermal ridge/AER - Eye development - Cutaneous structure development - Heart development - Development of the urinary and reproductive organs
  This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Mammalian_embryogenesis". A list of authors is available in Wikipedia.
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