Podcast
Questions and Answers
Initially, the paired dorsal aortae run through the entire length of the ______.
Initially, the paired dorsal aortae run through the entire length of the ______.
embryo
Later, the caudal portions of the paired dorsal aortae fuse to form a single lower thoracic/abdominal ______.
Later, the caudal portions of the paired dorsal aortae fuse to form a single lower thoracic/abdominal ______.
aorta
Of the remaining paired dorsal aortae, the right regresses and the left becomes the primordial ______.
Of the remaining paired dorsal aortae, the right regresses and the left becomes the primordial ______.
aorta
The unpaired ventral branches of the dorsal aorta supply the umbilical vesicle, allantois, and ______.
The unpaired ventral branches of the dorsal aorta supply the umbilical vesicle, allantois, and ______.
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The paired umbilical arteries pass through the connecting stalk (primordial umbilical cord) and join the vessels in the ______.
The paired umbilical arteries pass through the connecting stalk (primordial umbilical cord) and join the vessels in the ______.
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The umbilical arteries carry poorly oxygenated fetal blood to the ______.
The umbilical arteries carry poorly oxygenated fetal blood to the ______.
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Study Notes
Development of Dorsal Aortae
- Initially, paired dorsal aortae span the entire length of the embryonic body.
- Caudal portions of the paired dorsal aortae eventually fuse to create a single structure in the lower thoracic and abdominal region.
Transformation and Function
- The right dorsal aorta regresses, leaving the left to develop into the primordial aorta.
- Unpaired ventral branches of the dorsal aorta provide blood supply to important structures, including the umbilical vesicle and allantois.
Umbilical Circuit
- Paired umbilical arteries traverse the connecting stalk, which is the precursor to the umbilical cord, integrating with the vascular system.
- The umbilical arteries transport poorly oxygenated blood from the fetus to the placenta for oxygenation and nutrient exchange.
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Description
Learn about the development of blood vessels in embryos, including the fusion and regression of dorsal aortae, and the supply of different structures by ventral and vitelline arteries.
