L10 Human embryology and development
3 important questions on L10 Human embryology and development
What is the main difference between week 3 embryo and the adult body?
At what week does folding start?
- In week 3 the embryo still is a flat disc
- week 4
Some more folding
<- lateral folds will join ventrally
<- Cylindrical human body plan, day 28 (about 0.5cm)
<- simplified cross section through abdomen of an adult (essentially the same as above)
<- simplified cross section through abdomen of an adult (essentially the same as above)
Development of the cardiovascular system
<- development of the first flood vessels (hematopoësis)
Development of the heart
<- this begins with the formation of two endocardial tubes which merge to form the tubular heart, also called the primitive heart tube, that loops and septets into the four chambers and paired arterial trunks that form the adult heart.
The heart is the first functional organ in the vertebrae embryos, and in the human, beats spontaneously by week 4 of development.
<- this begins with the formation of two endocardial tubes which merge to form the tubular heart, also called the primitive heart tube, that loops and septets into the four chambers and paired arterial trunks that form the adult heart.
The heart is the first functional organ in the vertebrae embryos, and in the human, beats spontaneously by week 4 of development.
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