Msk embryology

Question 1

Derivative of the vertebral column

Answer 1

Paraxial mesoderm transform into osteoblasts that form the bony elements of the vertebral column.

Question 2

Derivative of Appendicular limbs

Answer 2

Somatopleuric mesoderm transforms into osteoblasts that form pelvic/pectoral girdles and bones of upper and lower limbs.

Question 3

Where does cardiac muscle derive from

Answer 3

Splanchnic mesoderm surrounding the primitive heart tube

Question 4

Where does smooth muscle of GI tract derive from

Answer 4

Splanchnic mesoderm surrounding gut tube.

Question 5

Which Pharyngeal arch are muscles of mastication derived from?

Answer 5

• 1st Pharyngeal arch–> innervated by Trigeminal nerve

Question 6

Which pharyngeal arch are muscles of facial expression derived from?

Answer 6

• 2nd Pharyngeal nearve –> Facial nerve