Circulatory system- blood (Edexcel GCSE Biology): Flashcards
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Practise the cards
13 cards from this deck
4 main components of blood
4 main components of blood
Plasma, red blood cells, white blood cells, platelets
Plasma colour and composition
Plasma colour and composition
Straw-coloured liquid, just over half blood volume
Substances transported by plasma
Substances transported by plasma
CO2, digested food, urea, hormones, heat
Shape of red blood cells
Shape of red blood cells
Biconcave - increases surface area for O2 absorption
Why red blood cells lack nucleus
Why red blood cells lack nucleus
To carry more haemoglobin
Red blood cell function
Red blood cell function
Transport oxygen from lungs to tissues for aerobic respiration
Oxyhaemoglobin definition
Oxyhaemoglobin definition
Haemoglobin combined with oxygen
Two types of white blood cells
Two types of white blood cells
Phagocytes and lymphocytes
Phagocyte function
Phagocyte function
Engulf and destroy pathogens through phagocytosis
Lymphocyte function
Lymphocyte function
Produce antibodies to neutralise pathogens
How antibodies help fight infection
How antibodies help fight infection
Bind to pathogens, coat them, attract phagocytes, neutralise toxins
Platelet structure
Platelet structure
Cell fragments produced from large cells in bone marrow
Platelet function
Platelet function
Blood clotting to stop blood loss when vessel damaged