BGDA Practical Placenta - Cord Development: Difference between revisions
From Embryology
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==Fetal Circulation== | ==Fetal Circulation== | ||
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==Terms== | ==Terms== | ||
Revision as of 18:12, 30 May 2012
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Placental Arteries and Vein
Placental Cord Histology
Placental cord cross-section
Placental vein
Placental artery
Placental allantois
Placental Cord Ultrasound
Ultrasound image of transverse scan through the cord show the method of estimation of the cross-sectional area.
Wharton's Jelly
- placental cord connective tissue (substantia gelatinea funiculi umbilicalis)
- amorphous substance containing glycosaminoglycans, proteoglycans and hyaluronic acid.
- cells similar to smooth muscle that allows a contractile function.
- network of collagen that form canaliculi and perivascular spaces.
- maintain blood flow to the fetus during placental cord compression during pregnancy or delivery.
First described and named after Thomas Wharton (1614–1673) an English physician and anatomist.
Hofbauer Cells
- located the core of placental villi
- macrophages with micropinocytotic activity and phagocytosis ability
- possible paracrine role for early stages of placental vasculogenesis
- express angiogenic growth factors (VEGF)
Fetal Circulation
Terms
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