Digestive System

Question 1

Alimentary Tract (GI Tract) primary organs

Answer 1

mouth, pharynx, esophagus, stomach, small intestines (duodenum, jejunum, ileum), large intestine (colon), rectum and anal canal

Question 2

Accessory organs

Answer 2

salivary glands, liver, gall bladder, pancreas

Question 3

2 divisions of oral cavity

Answer 3

• oral vestibule: situated anteriorly, It’s the space between the lips/cheeks, and the gums/teeth
• mouth / oral cavity proper: lies posteriorly to the vestibule. It is bordered by a roof, a floor, and the cheeks. The tongue fills a large proportion

Question 4

roof of mouth consists of hard palates and soft palates

Answer 4

Hard Palate: found anteriorly, a bony plate that separates the nasal cavity from the oral cavity. covered superiorly by respiratory mucosa (ciliated pseudostratified columnar epithelium) and inferiorly by oral mucosa (stratified squamous epithelium)

Soft palate: a posterior continuation of the hard palate. It is a muscular structure, acts as a valve that can lower to close the oropharyngeal isthmus, and elevate to separate the nasopharynx from the oropharynx

Question 5

Describe cheeks and nerves involved

Answer 5

cheeks are formed by the buccinator muscle, which is lined internally by the oral mucous membrane.
is innervated by the buccal branches of the facial nerve (CN VII)

Question 6

list all structures of anatomy of oral cavity

Answer 6

upper lip, superior labial frenulum, gingiva(gum), teeth
hard palate, soft palate, palatine arch, uvula
tonsil, behind it is retromolar trigone
tongue, under it is floor of mouth
inferior labial frenulum, lower lip