Oral Cavity: Anatomy, Tongue Muscles, Nerves And Vessels

Oral Cavity: Anatomy, Tongue Muscles, Nerves And Vessels

Question 1. What are the parts of the oral cavity? List their boundaries.
Answer.

The oral cavity (mouth) is divided into two parts:

1. an outer smaller part called the vestibule of the mouth and
2. an inner larger part called oral cavity proper.

Boundaries of vestibule of mouth

Oral Cavity  Externally: Lips and cheeks

Oral Cavity  Internally: Teeth and gums

Boundaries of oral cavity proper

Above (roof): Hard palate

Below (floor): Oral diaphragm formed by two mylohyoid muscles

On either side (lateral): Teeth and gums

Question 2. Enumerate the ducts that open in the oral cavity.
Answer.

Oral Cavity  Parotid ducts One on either side, open in the vestibule of the mouth opposite the crown of the 2nd upper molar tooth.

Oral Cavity  Submandibular ducts One on either side, open in the floor of the oral cavity proper on the summit of the sublingual papilla.

Oral Cavity  Sublingual ducts About a dozen in number, on either side, open in the oral cavity proper on the sublingual fold in a row.