Histologi Rongga Mulut (video 1 dari 3 video)- Histologi Bibir dan Palatum

Summary

This video lecture delves into the histology of the oral cavity, covering key structures such as the mucosa, tongue, and salivary glands. It explains the division of the oral cavity into two regions: the vestibulum and the oral cavity proper. The lecture explores the three types of mucosa—lining, masticatory, and specialized mucosa—each serving different functions in the mouth, such as protection, mastication, and taste. The anatomy of the lips, palate (hard and soft), and other oral structures are also discussed in detail, highlighting their histological features and roles in oral health.

Takeaways

• 😀 The oral cavity can be divided into two spaces: the vestibulum, located between the lips and teeth, and the oral cavity proper, located behind the teeth arches.
• 😀 The oral cavity is lined with mucosa, which is always moist due to the secretion of saliva from salivary glands.
• 😀 The epithelium of the oral cavity is stratified squamous, and it can be either keratinized or non-keratinized depending on the location.
• 😀 Keratinized epithelium in the oral cavity helps protect the mucosal layer during chewing and food intake.
• 😀 The oral cavity is anatomically situated between the nose (above) and the pharynx (behind), consisting of the nasopharynx, oropharynx, and laryngopharynx.
• 😀 The mucosa of the oral cavity is divided into three types: lining mucosa, masticatory mucosa, and specialized mucosa.
• 😀 Lining mucosa is non-keratinized and lines areas like the soft palate, inner cheeks, and the underside of the tongue.
• 😀 Masticatory mucosa is keratinized and found in areas exposed to chewing, such as the hard palate and gums.
• 😀 Specialized mucosa, found on the dorsal surface of the tongue, contains taste buds and is involved in gustation.
• 😀 The lips consist of three regions: the outer skin (keratinized), the vermillion (transition zone), and the inner mucosa (non-keratinized), with blood vessels making the vermillion red.
• 😀 The hard palate is directly attached to the bone, covered by keratinized epithelium, while the soft palate is flexible and contains minor salivary glands.

Q & A

What are the two main sections of the oral cavity?

The two main sections of the oral cavity are the vestibulum or the area between the lips and the teeth, and the oral cavity proper, which is the space behind the arches formed by the teeth in both the upper and lower jaws.

Why is the oral mucosa always wet?

The oral mucosa is always wet because it is continuously moistened by the secretion of saliva from the salivary glands.

What type of epithelium lines the oral cavity?

The oral cavity is lined with stratified squamous epithelium, which can be either keratinized or non-keratinized depending on the location within the oral cavity.

What is the function of keratin in the oral mucosa?

Keratin in the oral mucosa serves to protect the underlying tissues, particularly during chewing or mastication, by providing a tough, protective layer.

How is the oral cavity anatomically positioned relative to other structures?

The oral cavity is located below the nasal cavity and is bounded posteriorly by the pharynx, which includes the nasopharynx, oropharynx, and laryngopharynx.

What are the three types of mucosa found in the oral cavity?

The three types of mucosa found in the oral cavity are lining mucosa, masticatory mucosa, and specialized mucosa. Lining mucosa is non-keratinized, masticatory mucosa is keratinized, and specialized mucosa contains taste buds.

Where is lining mucosa found in the oral cavity?

Lining mucosa is found in the soft palate, the inner surfaces of the lips and cheeks, the floor of the mouth, and the ventral surface of the tongue.

What is masticatory mucosa, and where is it found?

Masticatory mucosa is a keratinized epithelium found in areas that experience heavy mechanical stress, such as the hard palate, the gums, and the dorsal surface of the tongue.

What is specialized mucosa, and where is it located?

Specialized mucosa is found on the dorsal surface of the tongue and contains taste buds. It is responsible for the sensation of taste.

What are the three regions of the lips, and how are they different histologically?

The lips consist of three regions: the outer part, which is similar to facial skin and contains hair follicles and sebaceous glands; the vermillion zone, which lacks sebaceous glands and sweat glands but has many blood vessels that make it appear red; and the inner part, which is lined with non-keratinized epithelium and contains minor salivary glands.