ZOO 3050 Lecture Notes - Lecture 8: Tight Junction, Blastocoel, Germ Layer

• School: University of Guelph
• Department: Zoology
• Course: ZOO 3050
• Professor: Todd Gillis

Document Summary

Blastula formation: cleavage produces a large number of cells, reorganized to yield a hollow chamber, embryo now called blastula, this (cid:862)(cid:271)lastula(cid:863) (cid:272)a(cid:374) look like a hollow (cid:271)all (cid:894)a(cid:373)phi(cid:271)ia(cid:374)s(cid:895) or disk sitting on top of yolk. Lecture 8-gastrualation i: active transport of na+ into blastocoel results in h2o flowing in passively, blastocoel sealed off from outside, h2o movement generates hydrostatic pressures forms blastocoel cavity in blastula, causes membrane to expand. Ectoderm (outer skin: outer tissue layer, gives rise to epidermis and nervous system, nervous system becomes internalized later during development. Mesoderm (middle skin: middle tissue layer, gives rise to. Lecture 8-gastrualation i: muscle, bone, connective tissue, circulatory system, urogenital system. Includes somatic tissue of gonad and kidney: majority of mass of body. Innermost layer: gives rise to, gut lining derivatives, epithelial portion of liver, pancreas and lungs, most tissues do not arise from only 1 layer-combination of layers.