Sunday, June 25, 2017

2.27: Describe the Structure and Function of the Human Alimentary Canal, including the Mouth, Oesophagus, Stomach, Small Intestine (Duodenum and Ileum), Large Intestine (Colon and Rectum) and Pancreas

ALIMENTARY CANAL: Digestive tract from Mouth to Anus

STRUCTURE OF ALIMENTARY CANAL:
                                       

Diagram showing Structure of Alimentary Canal


STRUCTURE OF ALIMENTARY CANAL:

STRUCTURE
FUNCTION
MOUTH
  • Mechanical digestion occurs
  • Large food is turned into a bolus to provide large surface area to volume ratio for salivary Amylase to break down Starch in food into Glucose
  • Saliva lubricates bolus for easy swallow

OESOPHAGUS
  • Tube connecting Mouth to Stomach
  • Peristalsis (wave-like contractions) occurs to push bolus down the tube towards Stomach

STOMACH
  • Peristalsis continues mechanical digestion, and enzymes begin chemical digestion
  • Hydrochloric acid maintains Optimum pH to increase rate of enzyme activity and metabolic reactions

SMALL INTESTINE
  • Lined with Villi to absorb digested soluble molecules into the circulatory system for use

LARGE INTESTINE
  • Absorbs Water from undigested food to produce faeces (stored in the Rectum and removed through the Anus)

PANCREAS
  • Synthesises pancreatic enzymes (Amylase, Protease, and Lipase)
  • Secretes pancreatic enzymes into the Stomach and Small intestine for digestion

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14 comments:

  1. James MayApril 7, 2018 at 4:37 AM

    Amazing!!

    ReplyDelete
  2. James MayApril 7, 2018 at 4:37 AM

    This is amazing

    ReplyDelete
  3. UnknownOctober 3, 2018 at 5:51 AM

    goood

    ReplyDelete
  4. UnknownDecember 2, 2018 at 8:23 AM

    thanks

    ReplyDelete
  5. UnknownFebruary 27, 2019 at 3:49 AM

    Here is says " amylase can break starch down into glucose" i thought this does not occur in the mouth and the amalyse only breaks it down to maltose in the mouth - the maltose is then broken down by maltase to glucose but in the stomach

    ReplyDelete
    Replies
    1. UnknownDecember 11, 2019 at 9:25 AM

      yeah that's true. They should change it

      Delete
    2. UnknownDecember 29, 2020 at 5:27 AM

      There is lots of amylase in your saliva as well as your pancreas. there is alpha amylase and pancreatic amylase

      Delete
  6. UnknownApril 18, 2019 at 7:47 AM

    I acc cba to learn these ahahahahha

    ReplyDelete
  7. UnknownApril 18, 2019 at 7:53 AM

    Missing the gall bladder and the liver.
    Liver - processes the blood that contains the nutrients, bile is made - which is one of the important roles in digesting fats.
    The bodies chemical factory
    Takes the raw materials absorbed by the small intestine and produces the chemicals that the body needs and detoxifies potentially harmful chemicals.
    Gall bladder -
    Storage sack for excess bile
    Helps absorb fats in the diet
    carries waste from the liver that cannot go through the kidney

    ReplyDelete
  8. AnomanousApril 22, 2019 at 6:14 AM

    That's covered in spec statement 2.30 I think

    ReplyDelete
  9. UnknownDecember 29, 2020 at 5:22 AM

    bando

    ReplyDelete
  10. danishJune 22, 2021 at 2:56 AM

    I found your this post while searching for information about blog-related research ... It's a good post .. keep posting and updating information. human resource

    ReplyDelete
  11. SylviaDecember 29, 2022 at 8:37 AM

    Nice post, very useful blogs with very useful information, thank you for sharing this post Intestinal bleeding .

    ReplyDelete

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