25-10-2023 2P: 2.4 Blood pressure and heart disease

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

2.4 Blood pressure and heart disease

Class rules

1. When i am explaining something, you listen;
2. Questions? Raise your hand;
3. Phones are in your bag;
4. At the end of the class i will tell you when to pack,
don't start when i'm still talking;
5. At the end of the class, make sure your chair is pushed back under your desk. 

Today

1. Paragraph 2.4, Blood pressure and heart disease
2. Working on assignments


Learning goals:
1.  Know what blood pressure is.
2. Know what the common diseases of the circulatory
system are and what causes them. 

Let's start with a little exercise

How many beats can you count?


What you felt is your pulse. 

What is blood pressure?

Write it down:
Heartbeat > blood forced out of heart > in to the arteries (under pressure). 

Your blood pressure is the pressure put on the walls of your arteries. 

Blood pressure

Systole 
- Ventricles contract, blood away
from heart

Diastole
- Ventricles relax and fill up

Hypertension

Your blood pressure changes throughout the day. 

Blood pressure remains high? > Hypertension >  dangerous.

Stroke = when an artery is blocked or ruptured. 

Atherosclerosis

A cause of hypertention

Buildup of fat > higher blood pressure

Artery blocked? > stop of bloodflow > heart attack

Plaque > bloodvestle can't expand > can burst > stroke 

Assignment

Read page 42, 43 and 44 of your textbook
1. Do the assignments that you got on monday


Done? Make your summary of paragraph 2.4 

Discussion about the questions allowed. 
Need help? Use the 3Bs!
1. Book
2. Brain
3. Buddy

If all 3Bs fail, ask the teacher. 

What did we learn today?

Learning goals:

1. Know what blood pressure is.

2. Know what the common diseases of the circulatory

system are and what causes them. 

Homework

1. Do the assignments that you got on monday

Due on Monday


Dont forget to push your chair back under your desk!