10 Questions
What is the opening of the gut tube at the cranial end of the embryo called?
Stomodeum
What is the origin of the mesenchyme within each pharyngeal arch?
Neural crest cells
Which structure is lateral to the stomodeum and just above the cardiac bulge in the developing embryo?
6 pairs of well-defined outgrowths (Pharyngeal Arches)
What happens to the 5th pharyngeal arch in the developing embryo?
It is either underdeveloped or merges with the 4th pharyngeal arch
What is seen within the cranial end of the developing embryo at week 3?
Neural tube
Which germ layer contributes the most to the mesenchyme within each pharyngeal arch?
Neural crest cells
What is the structure that separates the pharyngeal arches on the inside in the developing embryo?
Endoderm
Which cranial nerve is associated with each pharyngeal arch in the developing embryo?
Vagus nerve (CN X)
At what week does the embryo develop the stomodeum, the opening of the gut tube at the cranial end?
Week 4
What happens to the 5th pharyngeal arch in the developing embryo?
It merges with the 4th pharyngeal arch
Test your knowledge of embryology and developmental biology with this quiz on the early stages of human embryo development. Explore key concepts such as the cranial and caudal ends, neural tube formation, and the development of the stomodeum.
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