Chapter 21, Problem 3RFT

Summary Introduction

To review:

Match the term diastole with the most closely related descriptions given below:

Vein to the left atrium

Covers outer surface of the heart

Supplies blood to heart muscle

Lines inner surface of fibrous pericardium

Slow heart rate

Functional syncytium

Muscular wall of the heart

Relaxation phase of the cardiac cycle

Vein to the right atrium

Contraction phase of the cardiac cycle

Introduction:

The cardiac cycle has two phases, including systole and diastole, which is detected in the form of a heartbeat. The systole is accompanied with a ‘lub’ sound and the diastole with a ‘dub’ sound. These sounds are generated when the valves between the heart’s chambers open and close as blood pass through them.