the heart and circulation - basic recap Flashcards
oops... a bit of a repeat from the previous section... view this as the basic recap
what prevents the backflow of blood?
valve
why do you have a higher heart rate when you exercise?
- to increase the rate of respiration
—> to give your muscles more energy
how do you increase heart rate?
- signals from the brain cause the heart to contract
- the adrenal glands release adrenaline (hormonal system)
What is the colour of the blood on the right side?
BLUE - DEOXYGENATED
the left side is…
RED - OXYGENATED
pulmonary means…
the lungs
hepatic means….
the liver
renal means…
the kidneys
what is this system called that pumps blood around the body?
circulatory system
ARTERIES =
AWAY from the heart
VEINS =
TO the heart
the heart organ is a…
double pump
overall explanation…
The circulatory system consists of a closed network of blood vessels connected to the heart
Oxygenated blood is carried away from the heart and towards organs in arteries
These narrow to arterioles and then capillaries as they pass through the organ
In the organs, respiring cells use up the oxygen from the blood
The capillaries widen to venules and finally veins as they move away from the organs
Veins carry deoxygenated blood back towards the heart
