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The digestive system is composed of the gastrointestinal tract—commonly referred to as the GI tract or digestive tract—as well as the liver, pancreas, and gallbladder. The gastrointestinal system is made up of a succession of hollow organs connected by a long, twisting tube that runs from the mouth to the anus. The mouth, esophagus, stomach, small intestine, large intestine, and anus are the hollow organs that comprise the GI tract. The liver, pancreas, and gallbladder are the digestive system’s solid organs (NIDDK, 2019).
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Histology-Guide-015
The hard palate provides space for the tongue to move freely and supplies a rigid floor to the nasal cavity so that pressures within the mouth do not close off the nasal passage. In many lower vertebrates, the hard palate bears teeth.
Features of the Hard Palate:
– Mucosa (or mucous membrane) – stratified squamous non-keratinizing epithelium
– Rugae – large ridges that project into the oral cavity that aid in holding food.
– Dermal Papillae – small ridges of connective tissue that project into the epithelium. Reduce the mobility of the epithelium by expanding contacts between the epithelium and the underlying connective tissue. It also brings blood vessels in close contact with the epithelial cells.
– Submucosa – dense irregular connective tissue that supports the epithelium. They tightly adhere to the periosteum of the underlying bone.
– Minor Salivary Glands – found in many regions of the oral cavity
– Mucous cells – produce mucus to lubricate the surface of the epithelium
– Secretory Ducts – simple cuboidal epithelium
SOURCES:
Boffetta, P., & Hainaut, P. (2019). Encyclopedia of Cancer (3rd Edition). U.S.A.: Elsevier.
Brelje, T., & Sorenson, R. L. (n.d.). Chapter 14 – Gastrointestinal Tract. Retrieved from Histology Guide: https://histologyguide.com/slideview/MHS-246-hard-palate/14-slide-1.html?x=25694&y=7419&z=1.9
The Editors of Encyclopaedia Britannica . (2010, November 18). palate. Retrieved from Encyclopaedia Britannica : https://www.britannica.com/science/palate
The hard palate, which separates the nasal and oral cavities, is the bony front portion of the roof of the mouth. Its stiff structure aids in the production of clear speech and offers a firm surface for the tongue to press food against when chewing. The ridges on the hard palate's textured surface help with food manipulation during eating.
The hard palate is the hard part at the roof of the mouth that separates the mouth from the nose and helps with chewing. It is covered by a tough layer of cells that protect it and keep it moist.
The hard palate forms the bony front portion of the roof of the mouth, playing an important role in both digestion and speech. It provides a rigid surface against which the tongue can press food during chewing. Additionally, its protective lining keeps it resilient and helps maintain a moist environment in the oral cavity.