Page 1

• Digestive system is also known as what?

  Gastrointestinal tract or the alimentary canal
• The main function of the digestive system is to obtain MOLECULES from the ingested FOOD that are necessary for the MAINTENANCE, GROWTH, and ENERGY needs of the body.
• Digestive system consists of what 2 subcategory?

  Digestive tract and accessory digestive organs
• Give the organs included in the digestive tract?

  oral cavity, esophagus, stomach, small intestine, large intestine, rectum, and anus
• Give the organs part of the accessory digestive organs?

  salivary glands, liver, pancreas, and gallbladder
• What do you call a HOLLOW TUBE with a lumen of variable diameter?

  gastrointestinal tract
• The gastrointestinal tract consists of what 4 main layers?

  Mucosa, submucosa, muscularis, serosa.
• Identify the 4 major layers of the GI tract:

  A) Mucosa

  B) Submucosa

  C) Muscularis

  D) Serosa

  
• The oral cavity includes the LIPS, lining of the inside of the CHEEKS, from 2/3 of the TONGUE, upper and lower GUMS, and small area of the WISDOM TEETH
• The oral cavity is lined with what type of epithelium?

  Stratified squamous epithelium
• The stratified squamous epithelium of the oral cavity can either be what?

  keratinized, partially keratinized, and nonkeratinized
• What are the 3 differently covered surfaces of the LIPS?

  Internal mucous surface, vermilion zone, and outer surface
• The INTERNAL MUCOUS SURFACE is THICK, NON-KERATINIZED epithelium and many LABIAL SALIVARY GLANDS
• The VERMILLION ZONE is VERY THIN, KERATINIZED stratified squamous epithelium, and LACKS SALIVARY or SWEAT glands
• The OUTER SURFACE is a THIN SKIN, EPIDERMAL and DERMAL layers, and has SWEAT and SEBACEOUS glands.
• Label the following:

  A) Oral Mucosa

  B) Vermilion zone

  C) Skin

  D) Hair follicles

  E) Striated muscles

  F) Salivary glands

  
• What do you call a MASS of STRIATED MUCSCLE covered by mucosa?

  Tongue
• Tongue is oriented in what direction?

  all directions
• Tongue has a high level of what?

  motility