2.1 The Circulatory System and The Heart Flashcards
Which organisms have transport systems?
Large organisms
What is the human circulatory system made up of?
- blood vessels
- the heart
- blood
What is the heart?
A muscular organ that pumps blood around the body
How many pumps make up the heart?
2 pumps held together
Name 6 things that get carried around in the blood
- products of digestion
- oxygen
- carbon dioxide
- waste products
- hormones
- white blood cells
Why is the circulatory system known as a double circulatory system?
Because blood enters and leaves the system twice before making a full circulation
What make up the blood vessels?
- veins
- arteries
- capillaries
What do veins do?
Bring blood to the heart
What do arteries do?
Bring blood away from the heart
What do capillaries do?
Connect the veins to the arteries and they are also where substances are exchanged
What make up the blood?
- red blood cells
- white blood cells
- plasma
- platelets
What is blood plasma?
The liquid part of the blood that everything dissolves in
What colour is plasma?
Yellow
What does the plasma carry?
- carbon dioxide
- glucose to the organs
- urea to the kidneys
What do the red cells do?
- transports oxygen from lungs to organs
* carries haemoglobin
What do white cells do?
- engulf pathogens
- make antibodies
- make antitoxins
What are platelets involved with?
They are involved in blood clotting
What do platelets do?
- make scabs
* make fibres to close openings to prevent leakages
Why can the red cells carry haemoglobin?
They don’t have a nucleus
What is oxyhemoglobin?
Where oxygen is stuck to the red cells haemoglobin to be carries around