EMBRYOLOGY- LESSON 2
- University of Iowa
- Health And Exercise Science
- Health And Exercise Science 027
- EMBRYOLOGY- LESSON 2
Last Modified: 2011-06-30
Somite- (3parts) A mesodermal segment of the body of the embryo.
Intermediate Mesoderm: -kidneys -gonads
Lateral Mesoderm: (2 parts) 1.somantic mesoderm = - dermis of ventral portion of body -parietal serosa -connective tissues of limbs (bones joints and ligaments)
2. Splanchnic Mesoderm= -wall of digestive and respirator tracts except epithelial lining -visceral serosa -heart -blood vessels
- Day 16- the ingressing epiblast cells form a new layer between the epiblast and endoderm called the MESODERM - The epiblast cells that remain on the embryos dorsal surface make up the ECTODERM. ** all germ layers derived from epiblast cells.
-Closure of the neural tube begins at the end of week 3 in the region that will become the neck and then proceeds both cranially and caudally. - The cranial part becomes the brain, and the rest becomes the spinal chord.
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