Blood

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Blood

• By the end of the lesson you should
• Know the composition of Blood
• Know the function of red blood cells and plasma
• Know the different blood types
• Know about blood type compatibility in
  transfusions

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Blood

• the average human has 5 litres of blood
• it is a transporting fluid
• it carries vital substances like oxygen and
  nutrients to all parts of the body

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Human blood smear
X 500
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• plasma (55)
• red blood cells
• (5-6-million /ml)
• white blood cells
• (5000/ml)
• platelets

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• Plasma
• liquid part of blood
• plasma transports-
• soluble food molecules
• waste products
• hormones
• antibodies

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• Red blood cells (RBCs)
• transport oxygen
• hollowed out and filled with hemoglobin (oxygen
  carrying substance)

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• White blood cells
• the bodies defence
• part of the immune system
• much larger than RBCs
• far fewer

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• Platelets
• if you get cut
• platelets produce
• tiny threads
• these form a web-like mesh that traps blood
  cells.
• these harden forming a clot, or "scab."

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x 1000
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Blood types

• 4 Blood types
• A
• B
• AB
• O (lack of a type)
• Rh or
• Ex B,O-, AB-, etc.

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(No Transcript)
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Transfusions

• People need blood
• Excessive bleeding
• Organ transplants
• Blood and liver diseases
• Can only receive certain types of blood based on
  blood type

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can only receive what you have

• Can he receive B?
• Can he receive A?
• AB?
• O?

Patient has type A blood
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can only receive what you have

• Can she receive A ?
• Can she receive O ?
• O - ?
• AB - ?

Patient has Type O blood
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• Give blood!
• Must be 17 years old
• On Gottingen next to the Citadel
• Free Cookies!

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• http//www.youtube.com/watch?v0kdjmG7aIBEfeature
  channel - Blood Services