Human Anatomy: Oral Region

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Questions and Answers

What branches supply the upper lip?

Mental branches of the maxillary artery

Facial branches of the mandibular artery

Inferior labial branches of the mental artery

Superior labial branches of the facial and infra-orbital arteries (correct)

Which part of the lips is continuous with the labial mucosa?

Lower lip (correct)

Intra-oral vestibular part

Transitional zone

Upper lip

Where are the facial and mental arteries involved in blood supply?

Only the lower lip

Only the upper lip

Both the upper and lower lips (correct)

Neither the upper nor lower lips

How are arteries palpated on the lips?

By grasping the upper or lower lip Signup and view all the answers

What color range is seen in the transitional zone of the lips?

From brown to red Signup and view all the answers

What role does saliva play in the oral cavity?

It helps form the food bolus. Signup and view all the answers

What is deglutition?

The voluntary initiation of swallowing. Signup and view all the answers

Where is the oral cavity limited laterally and anteriorly?

By the dental arches. Signup and view all the answers

Which anatomical structures form the roof of the oral cavity?

The palate. Signup and view all the answers

Which of the following correctly defines the oral cavity proper?

The space between the dental arches. Signup and view all the answers

What is the primary purpose of chewing food?

To facilitate the formation of a food bolus. Signup and view all the answers

Which of the following best describes a food bolus?

A lump formed for swallowing. Signup and view all the answers

What does the term 'voluntary phase' refer to in swallowing?

The conscious effort to push the bolus. Signup and view all the answers

What is the primary function of the lips?

To act as valves for the oral fissure Signup and view all the answers

Which muscles are contained within the lips?

Orbicularis oris Signup and view all the answers

What do the labial frenula connect?

Lips to vestibular gingiva Signup and view all the answers

Which arteries are primarily associated with the lips?

Superior and inferior labial arteries Signup and view all the answers

What role do the lips play in speech?

They aid in articulation and production of sounds. Signup and view all the answers

The arterial ring formed in the lips is primarily due to anastomosis between which arteries?

Facial arteries Signup and view all the answers

Which of the following is NOT a function of the lips?

Helping with respiration Signup and view all the answers

What type of membrane covers the inner part of the lips?

Mucous membrane Signup and view all the answers

What is a mesiodens?

A supernumerary midline tooth Signup and view all the answers

At what age do deciduous central incisors typically erupt?

6-8 months Signup and view all the answers

Which of the following teeth is typically shed between the ages of 6 to 7 years?

Central incisor Signup and view all the answers

What does a pantomographic radiograph show regarding teeth?

The presence or absence of specific teeth Signup and view all the answers

What is the shedding age range for the 2nd deciduous molar?

9-11 years Signup and view all the answers

What nerve branches supply the upper lip?

Superior labial branches of the infra-orbital nerves Signup and view all the answers

Which lymph nodes do the upper lip's lymphatic drainage primarily flow to?

Submandibular lymph nodes Signup and view all the answers

What is the source of innervation for the lower lip?

Inferior labial branches of the mental nerves Signup and view all the answers

Lymph from the medial part of the lower lip first drains into which lymph nodes?

Submental lymph nodes Signup and view all the answers

Which of the following nerves does NOT supply the lips?

Mandibular nerves Signup and view all the answers

Which structure is primarily drained by the submandibular lymph nodes?

Upper lip Signup and view all the answers

What anatomical feature is associated with the drainage of the lower lip?

Philtrum Signup and view all the answers

Which part of the lower lip lymph drains to the submandibular lymph nodes?

Lateral parts Signup and view all the answers

What function does the oral cavity primarily serve?

Taste and mastication Signup and view all the answers

Which structure surrounds the mouth and aids in food manipulation?

Lips Signup and view all the answers

What is the vestibule of the mouth?

The space between the teeth and gums Signup and view all the answers

Which part of the mouth extends from the nasolabial sulci?

Oral vestibule Signup and view all the answers

What is the role of mastication in the oral cavity?

To form a bolus of food Signup and view all the answers

What type of mucosa lines the alveolar region?

Alveolar mucosa Signup and view all the answers

What connects the lips to the gums?

Frenulum Signup and view all the answers

Which part of the oral cavity is involved in tasting?

Tongue Signup and view all the answers

What does the term 'bolus' refer to in the context of the oral cavity?

A mass of chewed food Signup and view all the answers

What is primarily found in the oral vestibule?

Space between teeth and gums Signup and view all the answers

Which structure is NOT part of the oral cavity?

Esophagus Signup and view all the answers

What does lingual manipulation refer to?

Moving food with the tongue Signup and view all the answers

Which of the following is a component of superior lingual gingiva?

Proper gingiva Signup and view all the answers

What is the primary tissue type of the gingiva?

Epithelial tissue Signup and view all the answers

Study Notes

Oral Region

Includes the oral cavity, teeth, gingivae, tongue, palate, region of palatine tonsils
Oral cavity is for food ingestion and preparation for digestion
Chewing occurs with teeth, saliva from salivary glands forms a food bolus (swallowed)
Voluntary swallowing initiates in oral cavity
Involuntary process occurs in pharynx

Oral Cavity

Has two parts: oral cavity proper and vestibule
Vestibule is a slit-like space between teeth and gingivae
Vestibule communicates with exterior through oral fissure
Oral fissure size controlled by peri-oral muscles (e.g., orbicularis oris)
Space between upper and lower dental arches is the oral cavity proper

Lips, Cheeks, and Gingivae

Lips: mobile, musculofibrous folds that surround mouth; made up of skin and mucous membranes
Function: food grasping, controlling entry/exit of food, forming speech, osculation
Lips contain orbicularis oris controlling oral fissure
Cheek muscles are buccinator; lie between mucous membrane and buccinator
Cheeks have buccal fat-pads larger in infants
Supplied by buccal branches of maxillary artery, innervated by buccal branches of mandibular nerve
Gingivae: fibrous tissue covered with mucous membrane; attached to alveolar processes and teeth necks
Gingiva proper is pink, stippled, and keratinizing; alveolar mucosa (unattached gingiva) is shiny red and non-keratinizing

Teeth

Chief functions include incision, reduction, and mixing of food with saliva during mastication
Teeth assist in development and protection of supporting tissues
Used in articulation (distinct connected speech)

Parts and Structure of Teeth

A tooth has a crown, neck, and root
Crown projects from gingiva, neck between crown and root, root is fixed in socket by periodontium
Most of tooth is composed of dentin, covered by enamel, that protects the crown

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Description

This quiz focuses on the oral region, including the oral cavity, teeth, gingivae, tongue, and palate. Test your knowledge about the functions and anatomy components of the mouth, including the roles of lips, cheeks, and the vestigial space. Understand how food is ingested and processed during digestion.