12-07-11 Endoderm

12-07-11 Endoderm - ZOL320 Developmental Biology December...

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ZOL320 Developmental Biology December 7, 2011 Endoderm Endoderm: Developmental anatomy of endoderm was covered in the lab for chick and pig embryos Endoderm domains along the A-P axis give rise to: o Branches : Pharyngeal pouches, respiratory tube, allantois o Regional differentiation : Pharynx, esophagus, stomach, intestine, cloaca, and urogenital sinus o Buds : Thymus, thyroid , parathyroids, liver, and pancreas Pharyngeal pouch derivatives: o Thymus (between 1 and 2) o Eustachian tube – mammal inner ear/auditory tube o Tonsils o Parathyroid o Thymus – T-cells stay there for a while then migrate o Parathyroid (apparently, there are two) Digestive tube development: o The heart and liver influence each other’s development FGFs used to make heart used to induce liver formation o The intestines lengthen rapidly Embryo to adult: o Pig has an unusually large kidney o Large amount of small and large intestine o Intestinal loop becomes extraembryonic because there’s not enough room in the body; becomes part of body stalk Normal embryonic extrusion of the gut from the body wall
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This note was uploaded on 12/21/2011 for the course ZOL 320 taught by Professor Kopachik during the Fall '11 term at UCSB.

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12-07-11 Endoderm - ZOL320 Developmental Biology December...

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