Shark Muscles

Question 1

Answer 1

Coracomandibularis
- hypobranchial muscle
- depresses lower jaw (opens mouth)

Question 2

Answer 2

Intermandibularis
- ventral constrictor of branchiomeric muscles (visceral arch I)
- elevates floor of mouth (reduces volume of the oral cavity)

Question 3

Answer 3

Interhyoideus
- ventral hyoid constrictor (visceral arch II)
- compresses gill pouches

Question 4

Answer 4

Coracoarcuals
- hypobranchial muscles
- assists in depressing lower jaw (opens mouth)

Question 5

Answer 5

Hypaxial Musculature

Question 6

Answer 6

Fin Adductors
- flexes or adducts (depresses) the pectoral fin

Question 7

Answer 7

Adductor Mandibulae
- dorsal constrictor of branchiomeric muscles
- elevates meckel’s cartilage (closes jaw)

Question 8

Answer 8

Fin Abductors
- extends or abducts (elevates) the pectoral fin

Question 9

Answer 9

Preorbitalis
- dorsal constrictor of branchiomeric muscles
- elevates mecke’s cartilage (closes jaw)

Question 10

Answer 10

Coracohyoids
- hypobranchial muscles
- assists in depressing the lower jaw (opens mouth)

Question 11

Answer 11

Levator Palatoquadrati
- branchiomeric muscle (visceral arch I)
- elevates the palatoquadrate (upper jaw)

Question 12

Answer 12

Spiracularis
- Dorsal constrictor of branchiomeric muscles (visceral arch I)
- elevates the palatoquadrate (upper jaw)

Question 13

Answer 13

Levator Hyomandibulae
- part of second Dorsal Constrictor (hyoid constrictor)
- compresses gill pouches

Question 14

Answer 14

Levator Hyoideus
- part of second Dorsal Constrictor (hyoid constrictor)
- compresses gill pouches

Question 15

Answer 15

Cucullaris
- levator of visceral arches II-VII
- elevates the scapular process

Question 16

Answer 16

Horizontal Septum
- splits lateral muscular into dorsal epaxial and ventral hypaxial muscles

Question 17

Answer 17

Epaxial Musculature