The sounds heard over the cardiac region produced by the functioning of the heart. There are four distinct sounds: the first occurs at the beginning of SYSTOLE and is heard as a "lubb" sound; the second is produced by the closing of the AORTIC VALVE and PULMONARY VALVE and is heard as a "dupp" sound; the third is produced by vibrations of the ventricular walls when suddenly distended by the rush of blood from the HEART ATRIA; and the fourth is produced by atrial contraction and ventricular filling.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368
Aged
A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available.
Elderly
D012867
Skin
The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
D013851
Thinness
A state of insufficient flesh on the body usually defined as having a body weight less than skeletal and physical standards, such as BODY MASS INDEX, and dependent on age, sex, and genetic background.