YR2-K4-LSN7

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BiologieMiddelbare schoolhavo, vwoLeerjaar 2

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HAVE READY:
- JOIN THIS LESSONUP
- KERBOODLE PAGE 48
- YOUR NOTEBOOK
- GOOGLE CLASSROOM

Slide 1 - Diapositive

LESSON 7: Digestion

Slide 2 - Diapositive

HW for today: flyer on eating disorder
Short presentation
Asking questions

Slide 3 - Diapositive

TODAY'S LEARNING GOALS:
  • I have a good knowledge and understanding of the anatomy of the digestive system.
  • I have a good knowledge and understanding of physical digestion
  • I know how diet influences the form and function of teeth.

Slide 4 - Diapositive

TODAY'S KEY WORDS:
  • Ingestion 
  • Mechanical digestion
  • Chemical digestion
  • Absorption
  • Egestion
  • Defaecation 
  • Herbdvore 
  • Omnivore 
  • Carnivore 

read kerboodle pages 54-58

Slide 5 - Diapositive

DIGESTIVE ORGANS AND FUNCTIONS

Slide 6 - Diapositive

The digestive organs
  • write down the numbers 1-11 in your notebook
  • write down the names of the organs in your notebook
  • look up the functions of all these organs and briefly add these to your notes
timer
10:00

Slide 7 - Diapositive

rectum
pancreas
liver
mouth
stomach
oesophagus
large intestine
small intestine

Slide 8 - Question de remorquage

The digestive organs
  1. liver                        - creates bile
  2. gall bladder        - stores bile
  3. duodenum          - bile and enzymes from pancreas added
  4. appendix              - immunological defense
  5. esophagus          - transports food to stomach
  6. stomach               - protein digestion, stomach 
  7. pancreas              - creates digestive enzymes
  8. small intestine   - digests and absorbs nutrients
  9. large intestine    - absorbs water and location of microbiome
  10. rectum                   - stores faecal matter
  11. anus                        - exit hole

Slide 9 - Diapositive

TEETH:
  • INCISORS
  • CANINES
  • PREMOLARS
  • MOLARS

  • CHILD HAS 20
  • ADULT HAS 32

Slide 10 - Diapositive

Slide 11 - Diapositive

TEETH:
  • ENAMEL
  • DENTINE
  • PULP
  • GUMS

  • PLAQUE

Slide 12 - Diapositive

crown
root
dentine
pulp
jaw bone
gums
enamel
nerves & bloodvessels

Slide 13 - Question de remorquage

Slide 14 - Diapositive

Slide 15 - Diapositive

Slide 16 - Diapositive

CHEMICAL DIGESTION:

  • Cutting large polymers into monomers
  • Proteins, fats, carbohydrates
  • Enzymes required
  • Organs producing enzymes:
  • salivary glands, stomach wall, pancreas and small intestine wall

Slide 17 - Diapositive

ENZYMES

  • Salivary glands: amylase
  • Stomach wall: protease (pepsin)
  • Pancreas: protease, amylase, lipase
  • Small intestines: peptidase, maltase, nuclease

Slide 18 - Diapositive

BILE

  • PRODUCED by the lover
  • STORED in the gall blatter
  • contains emulsifying agents (bile salts)
  • contains waste products (bilirubin)
  • transporters via a tube to the duodenum

Slide 19 - Diapositive

EMULSIFICATION

  • by bile salts
  • devides larger globules of fat into smaller ones
  • increasing surface area for enzyme lipase from pancreas

Slide 20 - Diapositive

ABSORPTION

  • Once digestion is complete
  • monomers
  • second half small intestine 
  • water mainly absorbed in large intestine (colon)
  • microbiome provides help
  • produced vitamin K
  • helps digesting plant cell walls

Slide 21 - Diapositive

Peristaltic movements
  • Contractions of muscles 
  • esophagus, stomach, duodenum, small intestine, large intestine, rectum
  • sphincters (kringspieren) contract behind a bolus of food
  • moves food through the digestive tract

Slide 22 - Diapositive

Defecation
  • moving unabsorbed waste to rectum for storage
  • removing fecal (faecal) matter via anal orifice
  • everything between once in the three days and three times a day is good

  • Color and consistency of your poo tells you a lot about your health!
  • Looking back once or twice is a good idea

Slide 23 - Diapositive

IMPORTANT DEADLINES I
  • Project (food diary or lab report)
  • TV2E: April 6th
  • TV2H: April 5th
  • TV2I: April 5th

Slide 24 - Diapositive

IMPORTANT DEADLINES I
  • Project (food diary or lab report)
  • TV2E: April 6th
  • TV2H: April 5th
  • TV2I: April 5th

Slide 25 - Diapositive

IMPORTANT DEADLINES II
  • NO glossary, NO summary
  • INSTEAD:  optional practice quiz (2x in magister)
  • Practice quiz via kwizl in lesson 9 (two weeks from now)
  • TEST: in lesson 10 (three weeks from now

Slide 26 - Diapositive

HW FOR LESSON 8
  • COMPLETE THE IN CLASS ASSIGNMENTS FOR LESSON 7
  • DECIDE: Do I take the practice quiz? Yes or no
  • HAND IN your project assignment on time

Slide 27 - Diapositive