New Anatomy Content for Exam 3

Lessons 11 - done, 12, 13

What muscles open the mouth?

masseter, temporalis, medial and lateral pterygoid muscles

What muscles close the mouth?

the digastricus

What is the mandibular attachment of the masseter?

lateral mandibular ramus

What is the mandibular attachment of the temporalis?

coronoid process

What two nerves supply the digastricus?

rostral belly is supplied by the mandibular branch, the caudal belly is supplied by the facial nerve

What nerve supplies masseter, temporalis and the medial and lateral pterygoid muscles? It allows the animal to bite

The mandibular branch of the trigeminal nerve.

What tooth pair do dogs and cats share?

The carnassials, P4 and M1

How many equine cheek teeth are there? How much wear can be removed per year?

6 cheek teeth, 2-3mm a year

The monostomatic part drains through which duct?

Major sublingual duct

What can happen if you dehorn a cow later in life?

You can expose the frontal sinus

What order does a swallowed bolus travel from mouth to stomach?

Oral cavity, oropharynx, laryngopharynx, esophagus, esophageal hiatus, stomach

Along which edges do horse horse cheek teeth get sharp?

Buccal edges of upper teeth, lingual edges of lower teeth

What main esophageal coating of the dog and cow?

skeletal muscle throughout the tunica muscularis

What is the main esophageal coating of the horse?

cranial portion has skeletal muscle and transitions to smooth muscle in caudal third

What are the steps of regurgitation in a cow?

reticular contraction and reverse reverse esophageal peristalsis return cud through the pharynx