Year 9-Landmark 1 Flashcards
What are the names of the two exit points of blood?
Pulmonary artery and aorta
The pulmonary artery contains deoxygenated blood having come from the body while the aorta contains oxygenated blood having come from the lungs
Which vein contains deoxygenated blood
Pulmonary vein
Be saure to say in exam questions that veins take blood to the heart instead of it carries deoxygenated blood
Which blood vessel has valves?
Veins
This is to stop blood from going backwards this ensures it always goes towards the heart
How many chambers is the heart made up of?
4
These are the right and left atria and the left and right ventricles
What is the name of the hearts blood supply?
Coronary artery
These arteries branch of the aorta and makes sure the heart gets all the oxygen and nutrietns it needs
Which blood vessel has the largest lumen?
Footnote
Veins
Veins are has a very large lumen but small walls made of elastic fibres and smooth muscles
Which artery contains oxygenated blood
Pulmonary arteries
Be saure to say in exam questions that arteries take blood away from the heart instead of it carries oxygenated blood
Which blood vessel transports blood back to the heart?
Veins
What are the top chambers called?
The atria
Singular: Atrium
Which blood vessel is at the highest pressure?
Arteries
Takes blood away from the heart
What are the names of the two entry points of blood?
Vena Carva and the pulmonary vein
The vena carva contains deoxygenated blood having come from the body while the pulmonary vein contains oxygenated blood having come from the lungs
What is the name of the space in the middle of the blood vessel?
Lumen
Why are capillaries walls only a cell thick?
So diffusion can take place
Lower blood pressure so there is more time for substances to diffuse in and out
What is the leafs function?
To produce photosynthesis
What is the photosynthesis equation?
CO2 + H2O → CHO + O2
Carbon dioxide+water→glucose+oxygen
How many loops does the circulatory system have?
2
1 is oxygenated blood and the other is deoxygenated
Where does phototsynthesis take place in the leaf?
Palisade mesophyl
What are the bottom chambers called?
Ventricles
After leaving the heart what is the order of blood vessels?
Arteries, Capillaries and Veins
How often on average does the heart beat?
70 times a minute
this is over 100,000 times a day
True or False
Do all blood vessels link up?
True
How many valves are there in the heart?
4
These are to make sure blood is moving in the right direction
What is the smallest blood vessel?
Capillaries
This means that they come really close to all the cells in our body so they can diffuse substances to our cells (oxygen & nutrients) and waste products (carbon dioxide)
Calculate the rate of blood
2,560ml of blood passes through the aorta in 8 minutes. Calculate the rate of blood flow through the aorta in ml/min
320 ml/min
2,560/8=320
