the heart and cardiac muscle Flashcards
what is the layer surrounding the heart
the pericardium, which is a fibrous sack
what does the pericardium do
protects the heart by providing lubrication during its constant movement
what are the 4 main valves of the heart
tricuspid, bicuspid(mitral) aortic , pulmonary
what is cardiac muscle
similar structure to skeletal muscle but operates similarly to smooth muscle
how does tetanus work in the heart
you cannot have tetanic contractions in the heart
how do action potential differ between skeletal and cardiac muscle
skeletal is short and prior to muscle tension, cardiac is long as lasts almost as long as muscle tension
what is the metabolism like for cardiac muscles
highly oxidative
what type of action do cardiac muscles perform
involuntary (automatic nervous system)
