Organisation: The Cardiovascular & Respiratory System (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
Four components of blood
Four components of blood
Plasma, red blood cells, white blood cells, platelets
What plasma is
What plasma is
Liquid carrying blood components
What red blood cells carry
What red blood cells carry
Oxygen molecules
Shape of red blood cells
Shape of red blood cells
Biconcave disc
Why biconcave shape helps RBCs
Why biconcave shape helps RBCs
Provides large surface area
Do red blood cells have a nucleus?
Do red blood cells have a nucleus?
No, they have no nucleus
Why RBCs have no nucleus
Why RBCs have no nucleus
Allows more room to carry oxygen
Red pigment in red blood cells
Red pigment in red blood cells
Haemoglobin
Haemoglobin + oxygen forms
Haemoglobin + oxygen forms
Oxyhaemoglobin
Main role of white blood cells
Main role of white blood cells
Defence against pathogens (immune system)
What pathogens are
What pathogens are
Microorganisms that produce disease
What antibodies do
What antibodies do
Clump microorganisms together
WBC function: engulfing
WBC function: engulfing
Engulf and digest pathogens
What antitoxins do
What antitoxins do
Neutralise toxins from microorganisms
Main role of platelets
Main role of platelets
Help blood clot at wound site