Human Digestive System Overview
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Human Digestive System Overview

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Questions and Answers

What is the main function of the small intestine?

  • To store vitamins and minerals
  • To regulate blood clotting
  • To produce bile
  • To absorb nutrients and water (correct)
  • Which of the following accessory glands is associated with the duodenum of the small intestine?

  • Pancreas (correct)
  • Gallbladder
  • Kidney
  • Spleen
  • What structure increases the surface area for absorption in the small intestine?

  • Crypts of Lieberkühn
  • Microvilli (correct)
  • Folds of Kerckring
  • Cilia
  • Which part of the digestive system is responsible for absorbing water from indigestible food matter?

    <p>Large intestine</p> Signup and view all the answers

    What is the approximate length of the large intestine?

    <p>1.5 meters</p> Signup and view all the answers

    How many functions does the liver perform?

    <p>Over 500 functions</p> Signup and view all the answers

    Which part of the digestive system is responsible for the expulsion of feces?

    <p>Anus</p> Signup and view all the answers

    What is a unique feature of the liver?

    <p>It can regenerate itself</p> Signup and view all the answers

    What is the main type of cell found in the liver responsible for its essential functions?

    <p>Hepatocytes</p> Signup and view all the answers

    What structure serves as the 'gate' for various vessels, ducts, and nerves entering and exiting the liver?

    <p>Porta</p> Signup and view all the answers

    What is the shape of the hepatic lobules found in the liver?

    <p>Hexagonal</p> Signup and view all the answers

    What type of blood vessels are liver sinusoids, and what is their main function?

    <p>Enlarged capillaries that facilitate blood exchange</p> Signup and view all the answers

    Which structure collects bile produced by hepatocytes before it is transported to larger bile ducts?

    <p>Bile canaliculus</p> Signup and view all the answers

    What role do Kupffer cells play in the liver?

    <p>Maintain liver inflammation and protect it</p> Signup and view all the answers

    What happens to the liver when part of it is surgically removed?

    <p>Cells divide and regrow the lost tissue rapidly</p> Signup and view all the answers

    Which ligament separates the two major lobes of the liver?

    <p>Falciform ligament</p> Signup and view all the answers

    Study Notes

    Small Intestine

    • About 22 feet long, tube-like organ connecting the stomach to the large intestine
    • Digests food, absorbs nutrients and water, moves food through the gastrointestinal tract
    • Consists of the duodenum, jejunum, and ileum
    • The liver and pancreas are major accessory glands associated with the duodenum
    • Has finger-like projections called villi, covered with microvilli, which increase surface area for absorption

    Large Intestine

    • About 1.5 meters long, the final stage of the alimentary canal
    • Absorbs water from indigestible food matter
    • Consists of the cecum and colon
    • The large intestine is connected to the anus, the external opening of the rectum
    • Sphincter muscles control the closure of the anus
    • Feces are expelled from the body through the anus during defecation

    Liver

    • Largest gland in the body, weighing between 1 and 2.3 kg
    • Located in the upper part of the abdominal cavity
    • Performs over 500 functions, including breaking down food, producing bile, storing vitamins and minerals, and regulating blood clotting
    • Can regenerate itself

    Anatomy of the Liver

    • Two major lobes: right and left, separated by the falciform ligament
    • Two minor lobes: caudate and quadrate, visible from an inferior view
    • The porta (gate) is on the inferior surface, where vessels, ducts, and nerves enter and exit
    • Enclosed in a thin capsule and partially covered by peritoneum
    • Peritoneum folds form ligaments attaching the liver to the diaphragm

    Microscopic Anatomy of the Liver

    • The interior consists of hepatic lobules
    • A lobule has a central vein surrounded by radiating sheets of hepatocytes
    • Lobules are formed by hepatocytes arranged in pairs of columns
    • The lobes contain:
      • Hepatocytes: Main cell, responsible for majority of the liver's functions
      • Sinusoids: Enlarged capillaries where blood exchanges with the perisinusoidal space
      • Bile canaliculus: Microscopic spaces collecting bile and carrying it to larger ducts
      • Kupffer cells: Macrophages found in the liver, protecting it from inflammation

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    Related Documents

    Digestive System PDF

    Description

    Dive into the human digestive system with this quiz that covers the small intestine, large intestine, and liver. Explore key functions such as digestion, nutrient absorption, and the anatomy involved. Test your knowledge about this complex and essential system of the body.

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