Heart + Circulatory Flashcards
(13 cards)
function of semi lunar valve?
prevent backflow of blood into ventricle
function of septum
stops oxygenated + deoxiginated blood from mixing by separating left and right
What is the function of the capillaries
connect arteries and veins.
Tranfer nutrients + waste
Describe red blood cell
Biconcave shape
no nucleus
lots of haemoglobin
high SA:V
What is in the blood
Platelets
plasma
white blood cells
red blood cells
platelets function
clotting (fragments of cells used in blood clotting process to close wounds)
process of plasma
liquid part of blood which carries glucose, CO2, Urea ect
which of the 4 components of blood makes up the most of the blood
red blood cells
What is the benefit of having no nuclei in red blood cells
can fit more haemoglobin which binds to oxygen
what are downsides to having hole in heart
deoxygenated + oxygenated mix
deoxygenated blood to body cells
oxygenated blood to lungs
less oxygen to body cells
less aerobic respiration
less energy/ fatigue
death
effect of exercise on heart rate (say all)
muscles contract more
more energy / ATP required
more aerobic respiration
muscles need more oxygen + glucose
heart needs to pump faster
heart rate increases
breathing rate increases
more lactic acid produced
more CO2
What is coronary heart disease
-coronary arteries blocked with cholesterol/ plaque
-reduces blood flow + oxygen to heart muscle
-heart muscle dies
What increases risk of getting CHD
- diet w high saturated fat
-obesity
-smoking
-alcohol
-genetics
-lack of exercise
