Heart problems: faulty heart valves and the components of blood Flashcards
causes of faulty heart valves
-heart attack
-infection
-old age
what is the function of a heart valve
to maintain the blood flow in one direction
what valve prevents the back flow of blood from ventricles
atrio-ventricular
what valve prevents the back flow of blood from the blood vessel to ventricule
semilunar valve
as a result of a faulty heart valve
the blood doesn’t circulate effectively as normal
how can heart valves be replaced
by using
-biological valves
-mechanical valves
By replacing faulty valves what does this do
improves the circulation of the person and ensures more oxygen is delivered to their tissues
if more oxygens delivered to their tissues this means
-more cell respiartion occurs
-more energy can be released
Whats the difference between mechanical valves and biological valves
mechanical are man made
biological are taken from other humans or animals
both forms of valve replacement can lead to what
risks of infection
possible clots
heart attacks
strokes
what is a tissue
a group of specialised cells working together
e.g blood
what are the types of components
plasma
red blood cell
white blood cell
platelets
what is the function of a plasma
it carries the following around the body as a liquid
-red, white blood cells
-platelets
-nutrients (glucose)
-waste products (carbon dioxide)
and more
describe a red blood cell
-biconcave shape
-no nucleus
-contains haemogobin
function of a red blood cell
carry oxygen bound to haemoglobin
