2.7 Blood groups

2.7 Blood groups (transfusions)
Saving lives today!!
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BiologieMiddelbare schoolvwoLeerjaar 2

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2.7 Blood groups (transfusions)
Saving lives today!!

Slide 1 - Diapositive

Red blood cells don't:
A
transport oxygen
B
transport glucose
C
transport carbon dioxide
D
transport haemoglobin

Slide 2 - Quiz

White blood cells don't:
A
produce antibodies
B
belong to the immune system
C
eat pathogens
D
transport oxygen

Slide 3 - Quiz

Why do we have white blood cells?
A
To protect us from suffocating
B
To protect us from bleeding out
C
To protect us from the cold
D
To protect us from pathogens

Slide 4 - Quiz

How do white blood cells know what to attack?
Cells have antigens on the outside of their cell membranes. White blood cells scan all the cells they meet to see if the antigens belong to your body. Antigens it doesn't recognise will be attacked.

Slide 5 - Diapositive

Blood group A
Blood group B
Blood group AB
Blood group O
Antigen A
Antigen A
Antigen B
Antigen B
Antigen C
Antigen C

Slide 6 - Question de remorquage

About how much blood does an adult human have circulating in their body?

Slide 7 - Question ouverte

What blood group is someone with antigen A?
A
A
B
B
C
AB
D
O

Slide 8 - Quiz

What blood group is someone with antigen A and B?
A
A
B
B
C
AB
D
O

Slide 9 - Quiz

What blood group is someone with neither antigen A nor B?
A
A
B
B
C
AB
D
O

Slide 10 - Quiz

How do white blood cells fight foreign antigens?
White blood cells produce antibodies. These are small molecules that can connect to antigens and each other. They can cover pathogens and stop them from causing harm. Because they also stick together they cause clots of pathogens and antibodies stuck together.

Slide 11 - Diapositive

Slide 12 - Vidéo

Antibodies and blood groups
Blood groups have different antigens, but also different antibodies. This is because they only have antibodies against antigens that are not the ones they have themselves.
The antibody against the rhesus factor is called anti-rhesus and can only be produced by people who are rhesus negative

Slide 13 - Diapositive

Someone with antibody A and antibody B has blood group:
A
A
B
B
C
AB
D
O

Slide 14 - Quiz

Explain why you can't just give someone any type of blood with a blood transfusion

Slide 15 - Question ouverte

Figuring out someone blood group
When we need to give someone a blood transfusion we first need to know their blood group. We can do that by taking a bit of their blood and mixing it with antibodies to see if a reaction (clotting) takes place. Remember: antibody A clots with antigen A etc.

Slide 16 - Diapositive

Example
In the left tube there is antibody A, but there is no clotting. Conclusion: No antigen A present
In the middle tube there is antibody B, there is clotting. Conclusion: antigen B present

Blood group: B

Slide 17 - Diapositive

Finished!

Slide 18 - Diapositive