U2 B3 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

B3 The digestive organs

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 104-107

Lessongoals

• You can list the functions and characteristics of the parts of the digestive system
• You can list the digestive juices and their functions

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Homework: 1-8 4c, 9c, 10c pgs. 100-103 

What function can be performed by all nutrients?

1. Building material
2. Fuel
3. Reserve
4. Protective substance

What is the main function of a protein?

1. Building material
2. Fuel
3. Reserve
4. Protective substance

What is the main function of a carbohydrate?

1. Building material
2. Fuel
3. Reserve
4. Protective substance

In what part of the body is food taken in (to the bloodstream)?

duodenum

stomach

oral cavity

salivary gland

gall bladder

Liver

tongue

oesophagus

caecum

large intestine

small intestine

rectum

duodenum

Anus

pancreas

Digesting food

• Mouth: chewing and saliva

                        Saliva: digests starch (type of carbohydrate)

• Stomach: kneads and mixes food with digestive juices, gastric juice

                        Gastric juice: Kills bacteria and digests proteins

• Duodenum: bile en pancreatic juice

                        Bile : emulsifies fats

                        Pancreatic juice: digests proteins, carbohydrates and fats

• Small intestine: intestinal juices

                        Intestinal juices: digests proteins and carbohydrates

Mouth

Stomach

Duodenum

Small intestines

Carbohydrates

Carbohydrates

Carbohydrates

Proteins

Proteins

Proteins

Fats

Taking in nutrients

Small intestines

• Adds water (and intestinal juices)
• Takes in digested nutrients via intestinal villi

Large intestine

• Takes in water

Intestinal villi

The small intestine's walls are covered in intestinal folds, which in turn are covered in intestinal villi.

These villi absorb nutrients form the food that passes them and add these nutrients to your bloodstream

Digestion doesn't happen in all parts of the intestinal tract. Where does it NOT happen?

1. Stomach
2. Duodenum
3. Small intestine
4. Large intestine

In which of these organs is food taken in?

1. stomach
2. duodenum
3. small intestine
4. large intestine

What you should do:

• Read pages  104-107
• Do asgmt  1-8, 4c, 9, 10 pgs. 108-113

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 104-107
• Do asgmt 1-8, 4c, 9, 10 pgs. 108-113

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish