NURS 203 Chapter 20: Unit 2 - Jarvis Chapter 20 Summary
Document Summary
Jarvis: physical examination & health assessment, 2nd canadian. This section discusses key points about the structure and function of the heart and neck vessels. The cardiovascular system consists of the heart, which is a muscular pump, and the blood vessels, which provide pulmonary and systemic circulation through two continuous loops. The major anatomic features of the heart are the pericardium, myocardium, endocardium, atria, ventricles, valves, and chordae tendineae. The rhythmic movement of blood through the heart is the cardiac cycle, which has two phases: diastole and systole. o o. In diastole, the ventricles relax and fill with blood. In systole, the heart contracts and pumps blood from the ventricles into the pulmonary and systemic arteries. Events in the cardiac cycle produce heart sounds you can hear with a stethoscope. o o. The first heart sound (or s1) results from closure of the atrioventricular valves.
