Flashcards in chapter 17 Deck (52)
blood vessels that carry blood away from the heart
blood vessels returning blood to the heart
where is the heart located?
in the mediastinum between the second rib and fifth intercoastal space
double walled sac that encloses the heart
epithelial membrane that covers the pericardium
2 layers of the serosa
major veins of the heart
small cardiac vein
anterior cardiac vein
great cardiac veins
major arteries of the coronary circulation
right and left coronary artery
anterior and posterior interventricular artery
which side of the heart is the pump for the pulmonary circuit?
which side of the heart is the pump for the systemic circuit?
valves between the atria and ventricles
what connects smooth muscle cells and allows for ions to pass freely from cell to cell?
The pathway of blood from the heart to the lungs
Right atrium > tricuspid valve > right ventricle > pulmonary valve > pulmonary trunk > pulmonary arteries > lungs
Pathways of blood from the lungs through the heart
Lungs > pulmonary veins > left atrium > bicuspid valve > left ventricle > aortic valve > aorta > systemic circulation
Describe the cardiac muscle cells
striated, short, fat, branched, and interconnected
3 ion channels of cardiac muscles
1.Na+ channels for Na + inflow
2.K + channels for K + outflow
3.Ca2+ channels for Ca2+ inflow
what triggers the opening of Ca sensitive channels in the SR
where is the tricuspid valve located?
between the right atrium and ventricle
where is the mitral valve located?
between the left atrium and ventricle
to which side of the body is the apex of the heart pointed?
what marks the exterior boundary between the ventricles?
anterior and posterior interventricular sulcus
cardiac muscle tissue is found in which layer of the heart?
valve between the right atrium and ventricle
valve between the left atrium and ventricle
bicuspid or mitral valve
the anterior surface of the heart consists mostly of what chamber?
structure that prevents prolapse of the atrioventricular valves
how does oxygenated blood return to the heart?
through the pulmonary veins
where blood goes when it is pumped out of the left ventricle?
what prevents blood from flowing back into the left ventricle?
aortic semilunar valve