The Alimentary Canal: The Small Intestine (Leaving Cert Biology): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
How long is the small intestine?
How long is the small intestine?
6 metres
Name the two main parts of the small intestine
Name the two main parts of the small intestine
Duodenum and ileum
How long is the duodenum?
How long is the duodenum?
First 25 cm of small intestine
Main function of duodenum
Main function of duodenum
Digestion
What does peristalsis do in the duodenum?
What does peristalsis do in the duodenum?
Forces food backwards & forwards to ensure digestion
What do duodenum lining cells produce?
What do duodenum lining cells produce?
Digestive enzymes
What do liver & pancreas release into duodenum?
What do liver & pancreas release into duodenum?
Bile and pancreatic juice
Main function of ileum
Main function of ileum
Absorption
What are villi?
What are villi?
Infoldings in ileum that increase surface area
What is a lacteal?
What is a lacteal?
Structure in villus filled with lymph
What do lacteals absorb?
What do lacteals absorb?
Fatty acids and glycerol
Where do lacteals transport absorbed substances?
Where do lacteals transport absorbed substances?
To bloodstream near the neck
How does villi blood supply aid absorption?
How does villi blood supply aid absorption?
Rich capillary supply transports absorbed nutrients
How does length aid absorption in small intestine?
How does length aid absorption in small intestine?
Allows sufficient time for absorption