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13 Cards in this Set

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what does the endoderm develop?
lining of GI tract from pharynx to rectum; epithelium of trachea; bronchi, lungs, liver, pancreas, urinary bladder
what does the ectoderm develop?
mucous membrane, tooth enamel, hair, nails, mammory glands, nervous system; neural tube formation
what does the mesoderm develop?
heart, blood vessels, spleen, blood and lymph cells, bones, muscles; umbilical vessels pass through the connecting structure to the placenta
Fetal development:
length?
weeks 1-3
4/16 inch
Fetal development:
developing characteristics
weeks 1-3
embryo curls to C-shape; forebrain develops; heart prominence; arm and leg buds; primitive ears and eyes; yolk sac becomes primitive gut; early development of lungs and kidneys
Fetal development:
length
weeks 4-7
1-5 inch
Fetal development:
developing characteristics
weeks 4-7
continued brain development; retina, heart chambers, fingers, toes, eyes; palate and upper lip form; GI tract develops, but is still part of the umbilical cord; urogenital tract
Fetal development:
length and weight
weeks 8-10
1-1/8 inches
1-15 ounce
Fetal development:
developing characateristics
weeks 8-10
growth and maturation of structures that have already begun to form; skeleton bvegins to calcify
Fetal development:
length and weight
weeks 11-12
4-1/2 inches
2/3 ounce
Fetal development:
developing characteristics
weeks 11-12
facial features, eyelids, intestine separates from umbilical cord; palate fusion; genital structures visible; nail beds and tooth buds form
Fetal development:
length and weight
weeks 13-16
7-1/2 inches
3-1/3 ounces
Fetal development:
developing characteristics
weeks 13-16
limbs and trunk grow; fetus becomes active; placenta is prominent