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Embryology Practical Flash Cards

by: Deya Notetaker

Embryology Practical Flash Cards Bio 141

Marketplace > Rhodes College > Biology > Bio 141 > Embryology Practical Flash Cards
Deya Notetaker

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About this Document

Read-only definitions of terms needed for C. Jaslow's practical.
Biology II Lab
Dr. C Jaslow
Class Notes
Biology, embryology, embryo development




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This 2 page Class Notes was uploaded by Deya Notetaker on Sunday February 21, 2016. The Class Notes belongs to Bio 141 at Rhodes College taught by Dr. C Jaslow in Spring 2016. Since its upload, it has received 7 views. For similar materials see Biology II Lab in Biology at Rhodes College.


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Date Created: 02/21/16
Embryology Practical Flash Cards fertilization - first process of development; occurs once sperm reaches egg to form zygote zygote - fertilized egg; end of fertilization; transfer of paternal chromosomes to egg yolk - part of egg containing proteins & lipids; makes up most of vegetal pole; sinks to bottom of egg vegetal pole - portion of ovum containing most yolk and some cytoplasm; bottom of egg animal pole - portion of ovum with nucleus and some yolk, dark- colored; top of egg gray crescent - caused by shift of egg cytoplasm (cortex); forms opposite site of sperm penetration; marks region where gastrulation begins cleavage - second process of development; single-celled zygote undergoes mitoses to form blastula blastula - multicellular, hollow structure formed at end of cleavage; same size as zygote blastomere - cells that form blastula blastocoel - central cavity of blastula gastrulation - third process of embryo development; period of cell movement blastopore - curved groove in former gray crescent region; opening where surface cells migrate into blastocoel dorsal lip - area from where cells migrating into blastopore come from yolk plug - formed in mid-late gastrulation; outer circle around remaining yolk three primary germ layers - structure cells have arranged themselves into at end of gastrulation; includes ectoderm, mesoderm, and endoderm ectoderm - outer germ layer; forms outer layer of skin, brain,& spinal cord mesoderm - middle germ layer; forms muscles, skeleton, urogenital organs, muscle layer, & outer walls of digestive & respiratory tracts endoderm - inner germ layer; forms inner lining of digestive & respiratory tracts archenteron - cavity formed by endoderm; primitive gut; replaces blastocoel & eventually forms lumen of digestive tract organogenesis - fourth process of embryo development; primary germ layers form actual organ systems; lots of differentiation neural plate - part of ectoderm that will eventually form flattens into the structure; first stage of organogenesis neural fold - neural plate rolls up at edges into this structure; second stage of CNS formation; either side of neural groove neural tube - neural folds fuse into this; enclosed & hollow, aka dorsal hollow nerve cord; ultimately forms brain & spinal cord; third stage of CNS formation notochord - induces development of neural tube, forms from mesoderm; directly ventral to developing CNS


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