Circulatory system Flashcards
what is the role of the circulatory system
to supply organs and nutrients to the body
What are the main parts of the system
the heart, blood and blood vessels
what does the parts of the circulatory system do
It takes oxygen from your lungs and digested nutrients into the blood and transports them to important organs.
What is blood made up of
half fluid and half solids. Plasma and blood solids (white cells, blood cells, platelets)
Hearts role
to pump blood
blood vessels role
the blood vessels act like a highway, they are a connection of arteries and veins that transport nutrients, oxygen, waste and hormones around the body
How much blood is in the body
5 L
Why is plasma important
without it there wouldn’t be any fluidto help the blood cells flow where they need to go, additionally, many nutrients, drugs, ions and important proteins float in the plasma.
Red blood cells role
to carry oxygen and nutrients throughout the body
white blood cells role
to fight infection
platelets role
to clot the blood at the site of a wound
where are blood cells produced
in the bone marrow
red blood cell structure
shaped like a donut without the hole punched through, called a biconcave disk
what protein is inside of red blood cells and what does it do
haemoglobin binds itself to oxygen cells
what do platelets structure look like
small cell, spindle shape, no nucleus
white blood cell structure
irregular shaped cells, has a nucleus, medium side
arteries role
takes blood away from the heart
vein role
to bring blood to the heart
Capillaries role
to exchange gas and other nutrients with other cells
difference between arteries and veins
arteries have much thicker walls than veins
what separates the two sides of the heart and what separates the two ventricles
In the heart the left atrium and the right atrium are separated by a wall called the atrial septum.
There is a left and right ventricle separated by the ventricular septum.
what separates the atrium and the ventricle
a valve, to make sure the blood doesn’t flow backwards
how does blood reach the arteries
when the ventricles contract blood is pumped to the arteries
what to remember when drawing a diagram of the heart
Remember when you are drawing a diagram of the heart the right and left are opposites because you are looking at it like a mirror. The atrium are on the top and the ventricle are on the bottom
what are deoxygenated and oxygenated blood coloured
oxygenated = red
deoxygenated = blue
Right side pumps where
to the lungs via the pulmonary arteries to be oxygenated by the lungs
left side pumps where
to the rest of the body with oxygenated blood
where does blood go after being oxygenated
through the pulmonary vein to the left atrium
whats the aorta
the largest artery in the human body
where does the aorta split
The aorta then splits into smaller and smaller arteries, eventually becoming tiny capillaries. These blood vessels supply our cells with oxygenated blood.
bloods role
to carry materials around such as oxygen, carbon dioxide, food, molecules and waste. To transport hormones around the body. To transport heat. Help fight diseases.
