The Heart Flashcards
What is the thickness like of the atria and why?
Walls are thin with little amount of muscle because they are only pumping blood to the ventricles below.
What are the ventricle walls like?
Thicker than the atria but the left ventricle is thicker because it pumps blood around the body in aorta
Which side of the heart is for oxygenated blood
Left but on a diagram right
Which ventricle pumps blood to the lungs
Right ventricle
Which side of the heart is under more pressure
Left side
In a heat beat, does the atria or ventricle contract first?
Atria just before
What stops valves being turned inside out when ventricle contract?
Tendons supporting the valves
What is the valve found between the right atrium and right ventricle?
Tricuspid
What general term is sometimes used to describe both set of valves?
Atrioventricular valves
What muscle contracts and releases to pump blood around the body
The heart
What factors could change heart rate?
Can change during exercise and influence of adrenaline
What is the heart made of?
Cardiac muscle
The valve between the left atrium and left ventricle is the
Bicuspid
What factors could lead to heart disease
Blockages in cardiac/ coronary blood supply caused by fat deposits which can also occur in other blood vessels
Lifestyle such as lack of exercise, stress, diet with too much fat, smoking and gentle disease
Why is cardiac muscle special?
It never gets tired and contracts and releases regularly throughout life
