Large intestine

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6 Terms

1
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Large intestine structure

Lumen lacks villi and digestive glands but more goblet cells (mucous)

2
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Ceacum

Short blind ended sac that joins onto the ileum with ascending colon (ileocaecal junction)

3
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Colon

- Split into 3 sections

- Absorption of water, water-soluble vitamins and electrolytes

4
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Rectum

- Section of colon in pelvic cavity

- Faeces stored

- Lumen has longitudinal folds enabling lining to stretch

5
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Anus

- Internal anal sphincter has smooth muscle and involuntary control

- External anal sphincter has striated muscle and voluntary control

- Lumen has longitudinal folds enabling lining to stretch

6
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Composition of faeces

- Water and fibre

- Dead and living bacteria

- Mucus

- Steroblinin

- Sloughed intestinal sacs

- Secretion from anal sacs