Week 5 objective 4

Question 1

Somitomeres

Answer 1

initially pairs of segments of mesenchyme (barely discernable as segments) that begin to develop along and on other side of the neural plate in the paraxial mesoderm

Question 2

What kind of behavior do the somitomeres exhibit as the primitive streak regresses?

Answer 2

they add caudally

Question 3

20 pairs of somitomeres are formed….

Answer 3

around day 20. afterward, the first pair of somites forms caudal to the 7th pair of somitomeres

Question 4

difference between somitomere and somites

Answer 4

somites are more dense blocks of mesoderm that form along the notochord