Describe the light microscopic structure of; 1. Lips 2. Tongue including lingual papillae and taste buds 3. Oral Cavity (Cheeks, Teeth gums, hard & Soft palate) Describe the histological structure of parotid, Submandibular and sublingual glands. Compare and contrast the histological structures of parotid, submandibular and sublingual glands Describe the serous and mucous acini and give histological differences between the two. Describe the structure and location of serous demilunes. Describe histology of oropharynx Relate the characteristics of various layers of GIT with their function