8.4 a (1-13)

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

8.4

You will learn what types of blood vessels you have and how blood flows through your body.

You will learn what blood pressure is and how to measure it.

What is the pigment called that allows red blood cells to absorb oxygen?

1. Haemoglobin
2. Thrombosis
3. Fibrinogen
4. Blood plasma

Right atrium

Right ventricle

Left atrium

Left ventricle

Which percentage of the total volume of blood is pumped to the muscles during running according to you?

1. 10%
2. 20%
3. 50%
4. 80%

Why does a lot of blood need to flow to the muscles when you run?

1. To supply carbon dioxide + to remove oxygen
2. To supply carbon dioxide + to supply oxygen
3. To remove carbon dioxide + to supply oxygen
4. To remove carbon dioxide + to remove oxygen

Blood vessels

Arteries = blood vessels with thick, muscular walls that transport blood from the heart to the organs 

Capillaries = very small blood vessels

Veins = blood vessels that transport blood from the organs back to the heart

- Valves = prevent blood from flowing back; they are present in many veins and in and around the heart

Blood supply for the heart

Coronary arteries = arteries around the heart

Coronary veins = veins that transport oxygen-poor blood from the heart to a vena cava

pulmonary circulation: 

• heart - lungs - heart
• absorb oxygen, release carbon dioxide 

systemic circulation: 

• heart - body - heart
• release oxygen, absorb carbon dioxide

.

Blood pressure

= force with which blood pushes against the walls of blood vessels

Systolic pressure = the blood pressure that arises when the ventricles contract; this is the highest pressure

Diastolic pressure = blood pressure during heartbeat pause; this is the lowest pressure

Healthy blood pressure for young people = around 110/70 millimetre of mercury

What?	Read: 8.4 Make assignments 3-13
How?	In your book. You may whisper if you want to discuss an assignment with your neighbour.
Help?	Try to answer the question together. Raise your hand if you can't figure it out together.
Time?	15 minutes
Finished?	Check your answers with the solutions in Teams.
Proceeds	You have finished your homework! Well done!

Let's zoom in on the alveoli (end of the bronchioles).