30 / 03 Thursday Kaupapa: Describe how the nutrients from the food are absorbed into the blood stream while passing through the jejunum & ileum

Can you remember? What is digestion? Describe what happens to the food while inside the stomach Describe what happens to the food while inside the duodenum

Digestive System Teeth Tongue Salivary Glands Oesophagus Liver Gall Bladder Stomach Pancreas Small Intestine Large Intestine Rectum Anus

Part One: Mouth What happens to the food in the mouth?

Part Two: Oesophagus

Part Three: Stomach

Part Four: Duodenum duodenum (the first part of small intestine)

Stomach Liver Pancreas Gall Bladder Duodenum

Liver (produces bile) Pancreas (Produces pancreatic juice) Duodenum

What happens next?

duodenum (the first part of small intestine) jejunum & ileum (the second and the third part of small intestine)

Absorption in jejunum & ileum

Absorption in the jejunum & ileum The food that has passed through the duodenum enters jejunum, then ileum – the rest of the small intestine. Then the nutrients from the digested food get absorbed into the blood stream through the thin walls of the jejunum and ileum.

Lots of blood vessels Thin walls Villi

Dialysis Tubing Investigation Aim: to investigate how only small molecules can move across the walls of dialysis tubing glucose starch water + very thin dialysis bag

Dialysis Tubing Investigation Put glucose and starch solution into a dialysis tubing (the “sausage”) and seal both ends. Submerge the sausage in a beaker of water. Add a few drops of iodine solution to the water in the beaker. What do you expect to see? Why?

What have we learnt today? What are the names of the parts that the food goes to after going through the duodenum? What happens to the nutrients in the food?