Transport in Animals (OCR A-Level Biology A): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
Coronary circulation
Coronary circulation
Heart's own blood supply to cardiac muscle
Number of chambers in mammalian heart
Number of chambers in mammalian heart
Four (two atria, two ventricles)
Function of the septum
Function of the septum
Separates left & right sides, prevents blood mixing
Why left ventricle has thickest wall
Why left ventricle has thickest wall
Pumps blood throughout entire systemic circulation
Systole
Systole
Contraction phase of cardiac cycle
Myogenic heart
Myogenic heart
Heart initiates own contractions without nervous stimulation
SA node location & function
SA node location & function
Right atrium; natural pacemaker, initiates heartbeat
Why AV node delays impulse
Why AV node delays impulse
Allows atria to finish contraction before ventricles contract
P wave on ECG represents
P wave on ECG represents
Atrial depolarisation causing atrial contraction
Tachycardia
Tachycardia
Heart rate exceeding 100 bpm (too fast)