Cardiac Cycle + Transport systems Flashcards
Features of transport systems
A medium to carry material (blood)
A form of mass transport to move medium in bulk (heart)
A closed system of vessels to transport medium (blood vessels)
A mechanism to move the medium in vessels (valves + elastic arterial walls)
Which arteries and veins go to and from the kidneys
Renal vein/artery
Which artery and veins goes to and from the liver
Hepatic artery + vein
Hepatic portal vein (stomach and intestines)
Cardiac diastole
Atria relaxed and fills with blood
Atrioventricular valves open
Ventricles relaxed, lower pressure and fills
Arterial pressure high
Semi - lunar valves close to prevent back flow
Atrial Systole
Atria contract - High pressure
Ventricles relax, low pressure
Atrioventricular valves open
Blood flows from atria to ventricles
Ventricular Systole
Ventricles contract - High pressure
Atria relax - lower pressure
Atrioventricular valves close to prevent back flow
Semi lunar valves open
Blood flows from ventricles to arteries
What valves allow passage of blood from atrium to ventricles?
Atrioventricular valves
What valves allow passage of blood from ventricles out of the heart?
Semi lunar
What is meant by closed double circulatory system?
Blood is confined to vessels and passes twice through the heart
