Heart Sounds
The sounds of the heartbeat heard through a sthetoscope are made by the valves closing due to blood pressure.
The two sounds of the heartbeat are described as lub-dub.

Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
More in Transport in Animals
- Return of Tissue Fluid to Blood
- Chloride Shift
- Human Heart
- Structure and Function of the Heart
- Cardiac Cycle
- Basic Rhythm of the Heart
- Electrocardiograms
- Aortic Aneurysms
All 22 lessons in Transport in Animals · All OCR AS-level Biology topics