Papillae : The upper surface of the tongue has four types of papillae Vallate Papillae Filiform Papillae Fungiform Papillae Foliate Papillae, Dyspha

Vestibule : It is a slit like space bounded externally by lips and cheeks and internally by the gums and teeth.

Papillae : The upper surface of the tongue has four types of papillae

1. Vallate Papillae
2. Filiform Papillae
3. Fungiform Papillae
4. Foliate Papillae

These papillae have taste buds which respond to different types of taste.

Cirrhosis of the liver : The liver appears orange. It is due to the accumulation of bilirubin in the liver.

Dysphagia : Difficulty in swallowing the food.

Halitosis : Bad smell from mouth and bad breath. It is usually due to cavities in the teeth infection of throat and nose.

Oxyntic Cells : Oxyntic Cells are large and are most numerous on the side walls of the gastric glands. They secrete HCl.

Crypts of Lieberkuh : Crypts of Lieberkuh are simple, tubular structures which occur throughout the small intestine between the villi. Thet secrete digestive enzymes and mucus.