KINESIOL 1A03 Lecture Notes - Endometrium, Endolymph, Inner Cell Mass
27 Sep 2013
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Limb bud development 28 days arm bud develops first then leg bud. Apical ectodermal ridge thickening of ectoderm stimulates outward growth limbs grow proximal to distal. Thalidomide stopped blood vessels from forming, altered limb development. Mandibular process (2) lower jaw maxillary and mandibular move towards mid-line and fuse cleft palate improper fusion of mandibular processes. Myoblasts derived from the somites (mesodermal), early embryonic cells that develop into skeletal muscle fibres. Derived from neural tube and neural crest cells. Blood islands surface of yolk sac and inside embryo. Mesoderm blood vessels on the outside/inside expand and fuse forming the circulatory system. Middle cells of blood islands will form blood cells of cardiovascular system. Outside cells of blood islands will become walls of cardiovascular system. Blood islands form two parallel tubes and fuse together to form. Primitive heart tube signaled to form by endoderm: sinus venosus, atria, ventricle, bulbus cordis.
