V3 bs 3 and 7

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

TODAY' S PLANNING

- Gas exchange (alveoli)

- Smoking and diseases

K.P.68

moisture the alveolus

High oxygen concentration.

High carbon dioxide concentration.

one cell layer thick

cappilaries around the alveoli

oxygen goes into the red blood cells

oCarbon dioxide goes into the air

Red blood cell transport gasses

BS 7 SMOKING - why is it bad?

Quick summary:

• RESPIRATION
• VENTILATION
• GAS EXCHANGE

MAMMALS:

• lungs (alveolar wall)
• mucus
• air
• carried in the blood through the bloodvessels.
• the lungs are made up of millions of tiny airsacs (alveoli)

AMOEBA:

• cell membrane
• they live in water
• water
• through diffusion
• folds in the cell membrane

WORMS:

• the skin
• the cover the skin with mucus
• air (mostly)
• through bloodvessels
• through ridges in the skin

FISH:

• in gills
• with water
• water
• through bloodvessels
• many gills overlapping on gill ridges

INSECT:

• spiracles
• water
• air
• through tubes called spiracles on the side of the body
• the tubes go far into the body.

www.blf.org.uk

DISEASES:

• ASTHMA
• BRONCHITES
• EMPHYSEMA
• LUNG CANCER
• DAMAGE FROM SMOKING/DRUGS

Get to work

Complete worksheet bs 1 to 5

This is homework for the next lesson

Already finished? 
Make exercise 28 and 30 (bs 7)