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Placenta - Anatomy & Physiology (view source)
Revision as of 15:33, 7 December 2010
, 15:33, 7 December 2010no edit summary
::[[Gestation -Histotrophic Exchange - Anatomy & Physiology|Histotrophic]]
::[[Gestation -Histotrophic Exchange - Anatomy & Physiology|Histotrophic]]
* Nutrition supplied by uterine secretions/debris - 'Uterine milk'
* Often maintained by '''progesterone'''
* Nourishment of the embryo '''before implantation''' when there is no established placenta.
* Maintained for long period of time in ungulates, since implantation is late
** Horse: day 35
** Ruminants: day 15-20
* '''Pig and horse''': pinocytosis persists via '''areolae'''
* '''Sheep,cow,dog and cat''': pinocytosis persists via '''haemophagous zones''' that break down and release iron to the placenta.
::[[Gestation -Haemotrophic Exchange - Anatomy & Physiology|Haemotrophic]]
::[[Gestation -Haemotrophic Exchange - Anatomy & Physiology|Haemotrophic]]