B2 U3 2HVTTO

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

B2 The circulatory system

• Jacket in your locker
• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor
  
• Read pages 184-188

Lessongoals

• You can name three types of blood vessels with their features and functions
  
• You can name arteries and veins in the human circulatory system
  
• You can distinguish between the pulmonary and systemic circulation with their funtions

Homework U3 B2

Asgmt 1-9, 5c

OR challenge

Asgmt 6-11 

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Rewards

• +1 cm2 cheatsheet = you get to make a cheatsheet for a test. This starts being 1 by 1 cm. Everytime you earn this it gets 1 cm bigger to a max of 4 by 4 cm.
• 1/3 +0.5 = If you earn this 3 times you get to add 0,5 to one of your biology marks.
• Snitch = You can pick a classmate who also is checked for homework, you earn two V's (having 3 earns you a 1/3 +0,5)
• Too bad = You only get one V
  

penalties

• 45 min extra worktime = you need to come after school and do homework, this will last for 45 min or until the task is done
• Coloringpage = You get to pick a coloringpage, You need to color it and perform tasks that might be on it. You need to hand it in during the next lesson, If you don't you get 2 marks.
• 2/1 marks = a mark is an X, if you get 3 of these you will automaticly earn the 45 min extra worktime.
• Snitch = You can pick a classmate who also is checked for homework
• Lucky! = You don't get a penalty

Blood is made up of fluid and solid parts.
How many different solid parts can you find in blood?

1. 2
2. 3
3. 4
4. 5

The substance haemoglobin has a function in ..

1. Blood clotting
2. Transporting oxygen
3. Killing pathogens
4. Transporting waste

What substance gives blood its red colour?

1. haemoglobin
2. fibrinogen
3. blood plasma
4. thrombosis

When do platelets perform their function?

Think-Pair-Share

• Think: Work on the assignment on your own.
• Look at the image of the blood vessels, make a table in which you describe differences that you can see between them

• Pair: Discuss and compare with your neighbour, improve your answer
• Share: Talk about given answers during plenary session.

• Read pages 184, 187 en 188 about the blood vessels.
• Add more characteristics to your tabel for each blood vessel

                      artery             capillaries            vein

Artery	Capillary	Vein
high blood pressure	(v ery) low blood pressure	low blood pressure, valves prevent wrong bloodflow
thick, muscular, elastic wall	very thin walls, only 1 cell layer	thin, less elastic walls
flows towards organs	flows in/through organs	flows away from organs
flows away from heart		flows towards heart
often O 2 -rich blood, except pulmonary artery	O 2 , CO 2 and other substances are exchanged with tissues	often O 2 -poor blood, except pulmonary vein
often deeper inside the body	openings between cells in the walls of capillaries allow exchange of substances	often closer to the skin

Substances go in and out of the blood.

In most organs:

O2 and nutrients go out of the capillary, CO2 and waste go in to the capillary.

This means only 1 layer of cells form the wall that surrounds the blood. The wall is extremely thin!

In comparison arteries and veins have a lot more cells, forming many layers that make up their walls.

Head

lungs

Intestines

liver

other organs

vein

vein

artery

vein

vein

artery

vein

artery

artery

What you should do:

• Read pages  184-188
• Do asgmt  1,2,6 pgs. 188,191

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 184-188
  
• Do asgmt 1,2,6 pgs. 188,191

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Secret Student

This lesson, I have randomly picked someone to be the secret student.

I pay special attention to:

• Your use of English
• Your participation in the lesson

At the end I will reveal the secret student, If I can give them positive feedback, they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Can you use the characteristic underneath, to decide which type of blood vessel you're dealing with?
The blood flows towards the heart

1. Yes, artery
2. Yes, vein
3. Yes, capillary
4. no

Can you use the characteristic underneath, to decide which type of blood vessel you're dealing with?
The walls of the blood vessel are 1 layer of cells thick

1. Yes, artery
2. Yes, vein
3. Yes, capillary
4. no

Can you use the characteristic underneath, to decide which type of blood vessel you're dealing with?
The blood vessel contains blood rich in oxygen

1. Yes, artery
2. Yes, vein
3. Yes, capillary
4. No

Can you use the characteristic underneath, to decide which type of blood vessel you're dealing with?
The blood vessel contains valves

1. Yes, artery
2. Yes, vein
3. Yes, capillary
4. No

What is the difference between oxygenated and deoxygenated?

The portal vein is a special case.

It flows from the intestines towards the liver. 

In the intestines lots of substances enter the blood (you learned this in U2). Some of the substances might be harmful.

The liver checks the blood for dangerous substances and takes these out. 

Clean blood can then flow into you body.

Double circulatory system

One complete circuit means that the blood goes through the hart twice.

There are 2 parts:

• Pulmonary circulation

Blood goes from the heart to the lungs and back

• Systemic circulation

Blood goes from the heart to the other organs and back

pulmonary circulation

• Heart > Lungs > Heart
• Main job: get rid of CO2 and get O2.
• CO2 goes out of your blood into the alveoli, these then let you breathe out the CO2
• O2 is inhaled, the alveoli then transfer this O2 to your blood

systemic circulation

• Heart > other organs > Heart
• Main job: give all cells O2 and nutrients, take away CO2 and waste
• A single blood cell only flows through one organ per systemic circulation. (or 2 if it takes the portal vein route!)
• Capillaries inside the organs give of O2 en Nutrients which the cells of the organs use to stay alive and respirate.
• Cells in the organs give of CO2 (because of respiration) and waste, these substances are absorbed into the capillaries

Singular circulatory system

Gills

Heart

Lln zelf laten kijken en conclusies laten trekken!

You'll learn more about this in basics 4: excretion

portal vein

What you should do: U3 B2

• Pages  184-194
• Circulatory system assignment use page 185 to help you
• Asgmt  1-9, 5c

OR challenge

• Asgmt 6-11 

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Do other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do: U3 B2

• Pages 184-194
• Circulatory system assignment use page 185 to help you
• Asgmt 1-9, 5c
• OR challenge
• Asgmt 6-11 

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Secret Student

The secret student was .......

I paid special attention to:

• Your use of English
• Your participation in the lesson

If I can give them positive feedback, 

they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Tidy Duty

3 people each lesson

• Desks: empty and straight
• Chairs:  underneath the desks OR end of day: on the desks
• Floor: no rubbish