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Placenta - Anatomy & Physiology (view source)
Revision as of 15:33, 7 December 2010
, 15:33, 7 December 2010no edit summary
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::[[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]]