Blood Vessels & Blood (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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4 components of blood
4 components of blood
Plasma, red blood cells, white blood cells, platelets
Function of plasma
Function of plasma
Liquid that carries components in blood
Substances carried by plasma (name 4)
Substances carried by plasma (name 4)
Glucose, amino acids, carbon dioxide, urea
Function of red blood cells
Function of red blood cells
Carry oxygen from lungs to all cells in body
Shape of red blood cells
Shape of red blood cells
Biconcave disc shape
Why red blood cells have no nucleus
Why red blood cells have no nucleus
Allows more room to carry oxygen
What haemoglobin binds to
What haemoglobin binds to
Oxygen, forming oxyhaemoglobin
Role of white blood cells
Role of white blood cells
Part of immune system, defence against pathogens
Definition of pathogens
Definition of pathogens
Microorganisms that can produce disease
What are antibodies?
What are antibodies?
Small proteins that clump pathogens together
How some white blood cells attack pathogens
How some white blood cells attack pathogens
Engulf and digest them
Function of antitoxins
Function of antitoxins
Neutralise toxins produced by microorganisms
Function of platelets
Function of platelets
Help blood clot at wound site
Function of a scab
Function of a scab
Allows new skin to grow, prevents microorganisms entering
Result without platelets
Result without platelets
Excessive bleeding and bruising