| Lab 18 Oral Cavity and Salivary Glands: 1) Index 2) Introduction 3) Things to Identify 4) Hard Palate 5) Soft Palate 6) Tonsils 7) Tongue 8) Parotid Glands 9) Submandibular Glands 10)Sublingual Glands 11) Comparison of Structures 12) Practical |
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Hard
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| # 97 - Hard palate, monkey, h-e |
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The hard palate separates the nasal cavity from the oral cavity. Note the two types of epithelium present on the two surfaces of the hard palate. Is the thick stratified squamous layer of the hard palate papillated or non-papillated? Note the many nerve bundles in the lamina propria. Under the lamina propria of dense irregular connective tissue lies the relatively dense submucosal tissue that blends into the periosteum surrounding the palatal bone. Can you identify pale-staining mucous glands? REFERENCES: Gartner, pp. 267 - 268 Wheater, p. 236, Fig. 13.2 Ross, p. 405 - 407, Fig. 15.1, 15.2, 15.3 |
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This is an image of the Hard Palate. The blue arrow is pointing to the bone separating the oral cavity from the nasal cavity. The Hard palate is lined by the Masticatory Mucosa, (black arrows) which is a para-karatinized stratified squamous epithelium, which means that there is keratin present but there are still viable nuclei in the top layer of the epithelium. Blue arrow - Bone of roof of oral cavity Black arrow - Masticatory Mucosa
Here is a closer look at the Masticatory Mucosa of the hard palate, indicated by the blue arrow. In this view you can see that the nuclei go all the way up to the top layer of the epithelium. Also notice the prominent Dermal papillae and Rete Ridges which helps the epithelium with stand the wear and tear of chewing food.
Blue arrow - Mastigitory Mucosa ( stratified squamous para-keratinized epithelium) |
Hard Palate
Masticatory Mucosa |
