Embryology Flashcards
What type of mesoderm forms the Somites and Pharyngeal arches?
Paraxial mesoderm
What internal features do all somites contain?
Sclerotome - Cartilage and bone
Dermatome - Dermis of skin
Myotome - Muscle
A Nerve
What number of somites become branchial arches? What do the rest form?
Somites 1- 7
The other 35 pairs form the rest of the body wall and limbs
What internal structures do all branchial arches contain?
Nerve (a cranial nerve)
Artery
Cartilage
Muscle - branchial muscle
What is the difference between Branchial muscles and Somatic muscles?
Branchial muscles are formed from Branchial arches.
Somatic muscles are formed from the rest of the somites.
What cranial nerve is associated with Branchial Arch 1?
Trigeminal (V)
What cranial nerve is associated with Branchial Arch 2?
Facial (VII)
What cranial nerve is associated with Branchial Arch 3?
Glossopharyngeal (IX)
What cranial nerve is associated with Branchial Arch 4?
Vagus (X) Superior Laryngeal
What cranial nerve is associated with Branchial Arch 5?
Vagus (X) Recurrent Laryngeal
What structure arises from the first Branchial arch?
Anterior 2/3 of tongue
What nerve gives general sensory innervation to the first Branchial arch?
Trigeminal (V)
Which arch forms the posterior 1/3 of tongue?
Arch 3
Which nerve provides sensory innervation for posterior 1/3 of tongue?
Glossopharyngeal (IX)
Which structure arises from the fourth arch?
Epiglottis
