Nat5 Biology Unit 2 Multicellular Organisms Key Area 6 Transport Systems - Animals Flashcards
What is blood made up of?
Red Blood Cells
White Blood Cells
Platelets (aid in blood clotting)
Plasma (watery, straw-colored fluid)
What is Plasma?
It makes up about 55% of the blood
It carries various dissolved substances around the body to where they are required to or or where the are to be removed from,including:
Proteins (antibodies and some hormones)
Soluble end products of digestion e.g. glucose and amino acids
Gases such as carbon dioxide
What exactly do White Blood Cells do?
They are part of the immune system
They are involved in detecting pathogens.
What do Phagocytes do?
They carry out Phagocytosis by engulfing , breaking down, and digesting pathogens.
What do Lymphocytes do?
They produce antibody proteins which destroy pathogens.
Each antibody is specific to a particular pathogen. Antibodies attach to pathogens with a complementary shape and attract phagocytes to come to engulf and digest the pathogen
What is the function of the Red Blood Cells, and what adaptions do they have to meet these functions?
To transport oxygen around the body
They have no nucleus so they can carry more haemoglobin (which carries oxygen)
They have a bio-concave shape so they have a bigger surface area for oxygen to pass through
What are the two types of White Blood Cells?
Phagocytes
Lymphocytes
