Chapter 21, Problem 7RFT

Summary Introduction

To review:

Match the term myocardium 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 heart is the prime organ of the circulatory system, which is divided into four chambers in humans. The heart pumps blood continuously without resting. The immense pressure needs to be sustained, which is provided by its walls that surround this delicate organ.