anatomy Flashcards
which veins carry deoxygenated blood to the right atrium?
superior vena cava
inferior vena cava
which arteries carry deoxygenated blood away from the right ventricle?
pulmonary trunk -> left and right pulmonary arteries
which vein carries oxygenated blood to the left atrium?
pulmonary vein
which artery carries oxygenated blood away from the left ventricle?
aorta-> aortic arch, descending aorta
what is the name of the ligament between the pulmonary trunk + aorta and what is it a remnant of?
ligamentum arteriosum
remnant of ductus arteriosus
what are the valves on the right side of the heart?
tricuspid
pulmonary
what are the valves on the left side of the heart?
mitral
aortic
what is the intrinsic conduction system of the heart?
SA node -> AV node -> Bundle of His/AV bundle -> Purkinje Fibres
what is contained in the intercalated discs between cardiac muscle cells?
desmosomes- mechanically holds cells together
gap junctions- electrically connects cells (action potentials cross through it)
what does the p wave signal on an ECG?
atria depolarisation/excitation
when SA node sends electrical signals through atria
what does the QRS complex signal on an ECG?
ventricular depolarisation/excitation
when AV node sends electrical signals down Bundle of His + Purkinje fibres, through ventricles
what does the T wave signal on an ECG?
ventricular repolarisation (relaxed)
what bundle allows excitation from SA node to reach left side?
SA node on right atrium -> electrical impulses travel via Bachmann’s bundle to left atrium
what are the divisions of the left Bundle of His?
anterior fascicle
posterior fascicle
septal fascicle
