8.4

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

8.4

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

.

Which blood cells can also be found in the lymphatic system?

1. White blood cells
2. Platelets
3. Red blood cells

The figure at the right is a schematic drawing of a
number of blood vessels: a vein, capillaries,
a lymph vessel and an artery.
Which arrow shows the direction of flow in the
lymphatic vessel correctly?

1. arrow 1
2. arrow 2
3. arrow 3
4. arrow 4

Lymphatic vessels tranport lymph.
If you compare them to blood vessels their build is kind of similar to one of the types of blood vessel.
Which of the listed blood vessels is a lymphatic vessel most similar to?

1. Artery
2. Capillary
3. Vein

8.4 Your blood circulation

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.

Blood pressure

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

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

Systolic pressure = arises when the ventricles contract

Diastolic pressure = during heartbeat pause

Does each organ get the same amount of blood every time?

Heartrate at rest: 70 bpm

Heartrate during excercise: over 200 bpm

ventricles pump 70 ml everytime

Left: image of heartrate of a runner

What?	Read: 8.4 Make 10 assignments of 8.4
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!