Dissection of the Cat : Muscles (part 2)

Question 1

Sphincter

Answer 1

closes or constricts an ortiface

Question 2

Dilater

Answer 2

opens an ortifice

Question 3

Digastric (origin, insertion, action)

Answer 3

Origin - base of skull

Insertion - mandible

Action - depresses mandible

Question 4

Masseter (origin, insertion, action)

Answer 4

orgin - zygomatic arch

insertion - mandible

action - elevates mandible

Question 5

Sternohyoid (origin, insertion, action)

Answer 5

origin - manubrium

insertion - hyoid

action - pulls hyoid posteriorly

Question 6

Sternomastoid (origin, insertion, action)

Answer 6

origin - manubrium

insertion - posterior of skull

action - turns head and depresses snout

Question 7

Sternothyroid (origin, insertion, action)

Answer 7

origin - 1st rib

insertion - thyroid of skull

action - pulls larynx posteriorly