Module 2 Lecture 1

Oral cavity • Pharynx • Oesophagus • Stomach • Small intestine • Large intestine

The GI tract is a continuous 9-10cm tube from the mouth the to anus, it is made up of smooth muscle –> the GI tract pushed materials from one end to the other

Accessory digestive organs include the liver, gallbladder, pancreas and salivary glands

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Acquisition of nutrients

Mechanical and chemical breakdown of ingested food

Movement of food through GI tract peristalsis and segmentation

• Release of mucins, water, acid, and enzymes into the lumen of the digestive system

Transport of nutrients from the digestive system to the circulatory system

Elimination of feces

Wave muscular contraction that occurs throughout the GI tract (similar to pushing toothpaste through the toothpaste tube)

Back-and-forth churning that occurs mainly in the small intestine

inner lining of epithelium

layer of connective tissue with blood/lymph vessels/nerves

2 layers of smooth muscle (except esophagus; skeletal and smooth muscle, and stomach; 3 layers)

outer connective tissue covering organ

Lines inner surface of body wall; is attached to abdominal and pelvic walls; secretes peritoneal fluid and stores fat`

(wrapped around the organs within the Intraperitoneal space)

Folds of peritoneum that support the intraperitoneal GI tract organs; contain vessels, nerves, and lymphatics

the serous membrane lining the cavity of the abdomen and covering the abdominal organs.

Organs that are suspended into the peritoneal cavity CONTAIN mesenteries, are referred to as intraperitoneal organs, and are movable

Organs that are NOT suspended into the peritoneal cavity LACK mesenteries, are referred to as retroperitoneal organs, and are immobile (or fixed) e.g. pancreas, kidneys, duodenum, ascending & descending colon of LI SADPUCKER

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