Circulatory System Flashcards
(36 cards)
What is in blood?
White blood cells, red blood cells, platelets and plasma.
How much blood does an average size human have?
About 5 litres.
What are red blood cells for?
To carry oxygen around your body.
What are white blood cells for?
To help protect your body from disease. They ‘engulf’ it.
What are platelets for?
To clot the blood,to stop the bleeding and stop germs from entering.
What is plasma?
The straw coloured liquid that red and white blood cells and platelets float in.
You circulatory system is responsible for what?
Transporting oxygen and nutrients to your body’s cells and wastes such as carbon dioxide away from them.
This involves interactions between…
Blood cells, blood vessels and your heart.
What are the three types of blood vessels?
Arteries, veins and capillaries.
What are arteries?
Thick
Elastic
Carry blood under high pressure away from heart
What are veins?
Thin walls
Valves to prevent blood flowing backwards
Takes blood to the heart
What are capillaries?
Small
A lot of them
Transport oxygen and nutrients to cells and remove carbon dioxide.
What are the valves for?
To stop blood flowing backwards
Valve is open when it flows in correct direction
Valve closed to stop blood flowing the wrong way
What is different about the two sides of the heart?
One has deoxygenated blood and the other has oxygenated blood. Also one side is thicker to pump the blood to the rest of the body.
What colour is de oxygenated blood?
Blueish
What are the parts of the heart?
Superior vena cava Right atrium Right ventricle Inferior vena cava Artery Left ventricle Left atrium Pulmonary veins Pulmonary arteries Aorta
What are the four chambers? Which is top and which is bottom?
The upper two are called the atria, left and right atrium.
The lower two are the left and right ventricle.
What happens to a person with an irregular heartbeat?
They require a pacemaker which regulates their heart beat
What is strange about the cardiac muscle?
It never tires
What is blood?
The red liquid that exits your body if you cut yourself.
Is pulmonary artery, pulmonary veins, aorta, vena cava and carotid arteries oxygenated or de oxygenated?
Aorta, pulmonary veins and carotid arteries all have oxygenated blood
Pulmonary veins and vena cava are all de oxygenated
What are the organs in circulatory?
Heart and lungs
What are the organs in respiratory?
Lungs
What are the organs in excretory?
Kidney
Skin
Liver
Lungs
