2.2 What goes around comes around

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

Let's repeat! What have we discussed last lesson?

TASK!

Watch the video / listen to the rap and write down the route of the blood / a red blood cell through the circulatory system.

TIP: the first blood vessel is the (inferior) vena cava

LET'S CHECK THE ROUTE! 

pulmonary circulation

muscle tissue

TALKING EXERCISE

There are three types of muscle tissue:
 

voluntary (or skeletal) muscle which is strong but 

gets tired quickly, involuntary (or smooth) muscle 

which is weaker but does not tire quickly & cardiac muscle has a combination of characteristics from voluntary and involuntary muscle

Discuss with another student which two 

characteristics cardiac muscle has and explain why you think so.

Draw the circulatory system!

You take a paracetamol for a headache. (intestines - brain)

1. intestines
2. portal vein
3. liver
4. hepatic vein
5. inferior vena cava
6. right atrium
7. right ventricle
8. pulmonary artery
9. lungs
10. pulmonary vein
11. left atrium
12. left ventricle
13. aorta
14. brain

ACTIVITY.  COPY & FILL IN THE TABLE BELOW

ARTERY

CAPILLARY

VEIN

a bit muscular
/ towards the heart / often deoxygenated blood / not muscular / muscular / has valves / small diameter / important for gas exchange / microscopic / towards organs / lower pressure / wide diameter / away from organs / high pressure / elastic walls / runs through organs or tissues / diameter 0.001 mm / away from the heart / often oxygenated blood / very low pressure 

ARTERY

CAPILLARY

VEIN

away from the heart

often oxygenated blood

elastic walls

high pressure

towards organs

small diameter

muscular

a bit muscular

wide diameter

towards the heart

often deoxygenated blood

away from organs

has valves

very low pressure

not muscular

lower pressure

diameter 0.001 mm

microscopic 

important for gas

exchange

runs through organs or tissues