2.1 A matter of the heart

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Which parts of the heart do you already know?

Goals:

1. you know the names of all the parts of the heart

2. you can explain what a heartbeat consists of

3. you can explain why the heart is a double pump

4. you know which part of your body tells the heart to beat.

Read paragraph 2.1: A matter of the 

up to "four heart valves"

Write down the covered text on your whiteboard. You can find the right words in the paragraph.

Example: the heart belongs to the circulatory system

Covered text

Your heart is a double pump. This means the hearts right side pumps blood to the lungs and it's left side pumps blood to your whole body.

This why the left side is a lot more muscular.

The heart has four chambers called: the right atrium, the left atrium, the right ventricle and the left ventricle.

A heartbeat consists of your atria contracting and when they pause, your ventricles contract. This is de lub dub sound your heart makes.

Heart beat in 3 stages

Atriums contract

Ventricles contract

Pause

assignment: fill in the names of the all the heart valves in your empty heart. And answer the question.

mnemonic (=ezelsbruggetje)

Let's think of a mnemonic to remember where the tricuspid and the bicuspid valves are located!

Thanks to the artery valves, the blood doesn't flow back into the...

1. Ventricles
2. Atriums

The right order in heartbeat is

1. Ventricles - atriums - pause
2. Atriums-Ventricles - pause
3. Pause - atriums - ventricles
4. Pause - ventricles- atriums

1. 9 = valve
2. 9 = aortic valve
3. 9 = pulmonary valve
4. All answers are wrong

For the next two questions you need to use the picture of the heart in your book!

The heart pumps oxygen rich blood into the?

1. Superior vena cava
2. Pulmonary arteries
3. Aorta
4. Aorta and pulmonary arteries

The heart receives oxygen rich blood from the ...

1. Pulmonary veins
2. Pulmonary arteries
3. Coronary arteries/veins
4. Aorta

Sinus cells (pacemaker) - nerve cells that initiate the heart beat

assignment

do excercise 11 in pairs

done? start on  your homework

STUDY 2.1 do all the excercises (for next thursday!)