Heart skaidrės apie širdį anglų kalba
Anglų skaidrės. Human heart. Amazing facts. The heart beats. Functions. Pumps blood through the blood vessels of the circulatory system. The shape of the heart is similar to a cone. Structure. Adult heart – size of a fist ~13cm length. The heart is situated in the middle of the mediastinum. Structure location. Structure chambers. Heart is divided into 4 chambers right atrium. Structure layers. Thickness of the wall depends on the development of muscular layer. Atrioventricular valves Tricuspid (between. Semilunar valves Pulmonary (right. Structure coronary circulation. Coronary arteries supply blood to the heart right coronary artery. Thank you.
Adult heart – size of a fist: ~13cm length; 9cm-7cm thick. Heart mass: female ~300g; male ~350g. Weight depends on: age; physical development; nature of the activity.
Thickness of the wall depends on the development of muscular layer.
Consists of 3 layers: Outer serous – epicardium Middle muscular – myocardium Innermost endothelic – endocardium.
Atrioventricular valves: Tricuspid (between right atrium and right ventricle) Mitral / bicuspid (left atrium and left ventricle) Prevents blood from being blown back to atria.