The Mouth and Buccal Cavity - Anatomy of the Human Mouth (2024)

Table of Content:

What is Buccal CavityParts of the Buccal CavityFrequently Asked Questions

What is Buccal Cavity?

The mouth is also called the buccal cavity or the oral cavity. In the human digestive system, the mouth is the upper end, or the beginning of the alimentary canal, which leads to the pharynx and to the oesophagus. In humans, both the mouth or the buccal cavity and the nasal cavity are separated by the palate.

The buccal cavity mainly comprises the primary organ of the digestive system including the teeth, tongue and salivary glands.

Also, read Digestive System In Humans

The mouth is an opening through which the food is taken inside the body. It is bounded by lips and its inner parts comprise the cheeks, tongue, upper jaw and lower jaw.

The upper jaw is fixed, which forms the roof of the mouth cavity and consists of the palate, teeth, and gums surrounding the teeth. The lower jaw is movable and forms the floor of the mouth cavity, which consists of the tongue along with the teeth and gums surrounding them. The parts of the mouth play an important role in speech and helps in breathing in certain cases, when the nose is blocked and during strenuous exercise. It is also the most important part of the human body, which permits us to enjoy the food we eat and also to communicate with the rest of the world.

The mouth or the oral cavity comprises two parts:

  • The oral cavity proper — It mainly comprises the tongue.
  • The oral vestibule – It is the slit-like space between the teeth and the buccal cavity and between the lips and cheeks.

Let us learn in detail about the main parts of the buccal cavity or oral cavity.

Parts of the Buccal Cavity

The parts of the mouth include lips, teeth, gums, mouth cavity with buccal mucosa, salivary glands and tongue. Let’s have a look at each structure.

Lips

Lips are soft, muscular and movable structures, which are formed by the complex of orbicularis oris muscles. The reddish-pink appearance of the lips is mainly because of the underlying blood vessels which are covered by the thin and transparent epithelium tissues.

Buccal mucosa

It is the inner lining of the cheeks and the back of the lips. It provides a round shape to the cheeks.

Tongue

It is a large, muscular organ, which occupies most of the oral cavity and can take up a variety of shapes and positions. There are 50 to 100 taste receptor cells in each taste bud, which are located in the lining of the mouth. It is the main sense organ of human beings and is involved in:

  • Sense of Taste
  • A major organ of speech
  • Oral cleansing of the mouth
  • Squeezing food into the oropharynx while swallowing
  • Formation of clear and distinct sounds during the speech.

Teeth

The teeth are the strongest and most rigid substances in the human body. A normal adult has 32 teeth and is divided into incisor, canine, molars and premolars. There is a third molar, which is called the wisdom teeth, which appear in a person’s late teens or early twenties.

Each tooth consists of a crown with one or more tips, a neck, and a root. The Pulp cavity is the centre part of the tooth, filled with blood vessels, nerves and connective tissues and is surrounded by an enamel, which protects the tooth against scratch, cut and the invasion of bacteria present in the mouth.
The Mouth and Buccal Cavity - Anatomy of the Human Mouth (1)

Also, read Teeth – Different Types in Humans

Frequently Asked Questions

What are the main parts of the mouth?

The mouth, also called the oral cavity includes teeth, tongue, salivary glands, tonsils, back of the throat and the epiglottis. The mouth is an important part as it is helpful for speech and communication, eating and digestion, and can also be used for breathing.

What is the function of the buccal cavity?

The buccal cavity or oral cavity is the beginning of the alimentary canal, which leads from the pharynx to the oesophagus. It is separated by the palate and functions as an entrance to the digestive system and is composed of the teeth, tongue, and palate.

What are the 4 types of teeth?

The four types of teeth are – incisors, canines, premolars and molars.

This was a brief introduction to the parts of the mouth. Stay tuned with BYJU’S to learn more about the mouth, digestive system and other related topics at BYJU’S Biology

The Mouth and Buccal Cavity - Anatomy of the Human Mouth (2024)

FAQs

The Mouth and Buccal Cavity - Anatomy of the Human Mouth? ›

The mouth is an oval-shaped cavity inside the skull. The two main functions of the mouth are eating and speaking. Parts of the mouth include the lips, vestibule, mouth cavity, gums, teeth, hard and soft palate, tongue and salivary glands. The mouth is also known as the oral cavity or the buccal cavity.

What is the difference between buccal cavity and mouth cavity? ›

The buccal cavity mainly comprises the primary organ of the digestive system including the teeth, tongue and salivary glands. The mouth is an opening through which the food is taken inside the body. It is bounded by lips and its inner parts comprise the cheeks, tongue, upper jaw and lower jaw.

How many teeth are in the buccal cavity? ›

Adults have more teeth than children; most adults have 32 teeth. Among these teeth are 8 incisors, 4 canines, 8 premolars, and 12 molars (including 4 wisdom teeth).

What is oral cavity anatomy? ›

(OR-ul KA-vih-tee) Refers to the mouth. It includes the lips, the lining inside the cheeks and lips, the front two thirds of the tongue, the upper and lower gums, the floor of the mouth under the tongue, the bony roof of the mouth, and the small area behind the wisdom teeth.

What organs are in the buccal cavity? ›

Parts of the mouth include the lips, vestibule, mouth cavity, gums, teeth, hard and soft palate, tongue and salivary glands. The mouth is also known as the oral cavity or the buccal cavity.

What does buccal cavity help in? ›

The buccal cavity is present at the beginning of the digestive tract, and is where the process of digestion begins. It is involved in processes such as chewing and swallowing (i.e., mechanical digestion), and also plays a role in communication and vocalization.

What happens to the food in the buccal cavity? ›

Digestion of carbohydrate occurs in the buccal cavity. When the ingest, teeth in buccal cavity chew the food particles and tongue mix the food and saliva from the salivary gland. This food paste is called as a bolus. Saliva contains salivary amylase enzyme that converts complex carbohydrate in a simpler form.

What two major functions does the buccal cavity perform? ›

The buccal cavity helps to take the food inside by the process of ingestion by. performing two major functions: Mastication of food, Facilitation of swallowing.

Which gland is present in the buccal cavity? ›

Salivary glands are present in the buccal cavity and secrete saliva that helps in the digestion of food.

What is the roof of the mouth called? ›

The palate is commonly called the roof of the mouth. It is divided into two parts: the bony hard palate in the front, and the fleshy soft palate (called the velum) in the back of the mouth.

What happens if you lose your molars? ›

If one is missing, the teeth will grow haphazardly due to misalignment. The missing tooth can cause adjacent teeth to lean and shift into the gap. This ruins the natural alignment of teeth, causing a crooked smile, bite problems, jaw problems, or headaches.

What side of the tooth is buccal? ›

The buccal (or cheek-side) of your teeth are usually smooth. One exception is that your lower molars may have buccal pits. The lingual (or tongue-side) of your teeth are also usually smooth, this time with an exception of upper molars that often have lingual grooves ending in a pit.

What is the difference between the mouth and the buccal cavity? ›

Difference Between the Mouth and Buccal Cavity

The major organ of the digestive system, comprising the teeth, tongue, and salivary glands, is housed in the buccal cavity. The mouth is an orifice that allows food to enter the body. It is bordered by lips and contains the cheeks, tongue, upper jaw, and lower jaw.

What is oral cavity problem? ›

Most cases are dental caries (tooth decay), periodontal diseases, tooth loss and oral cancers. Other oral conditions of public health importance are orofacial clefts, noma (severe gangrenous disease starting in the mouth mostly affecting children) and oro-dental trauma.

What is oral fissure? ›

In comparison to an oral ulcer, a fissure represents a deep groove or crack in the soft tissues, rather than a loss of the top layer of tissue.

What does the term buccal mean in the oral cavity? ›

(BUH-kul myoo-KOH-suh) The inner lining of the cheeks.

What is the difference between oral and buccal administration? ›

Compared to orally ingested capsules and tablets, buccal tablets provide a more rapid onset of action because the oral mucosa is highly vascularised. Buccal tablets are also used in emergency situations because they can exert their effects quickly.

What is a cavity in the mouth? ›

Cavities are areas in the hard surface of your teeth that are damaged. These areas of tooth decay become tiny openings or holes that can lead to a serious toothache, infection and tooth loss.

Is a buccal pit a cavity? ›

If your dentist says you have a buccal, it points to a cavity that needs filling. Discoloration of the teeth and other signs of decay should not go unnoticed either, let alone untreated. There are no compromises in oral hygiene, especially the grooves and irregular surfaces of the teeth.

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