Embryonic development - Week 4

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HWC

By: HWC

Date Uploaded: 09/29/2019

Tags: Fertilization   human body  

• The flat trilaminar embryonic disc undergoes embryonic folding to form a three-dimensional cylinder shaped embryo. • Most organ systems continue, or start, to develop (organogenesis): • The nervous system and chorion continue to develop. • The heart and the rest of the cardiovascular system continue to form. • The digestive system begins to form. • Portions of the entire digestive tract are now present. • Ears, eyes and limb buds begin to develop.

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