Heart and Lungs

Function of the heart

The heart pumps blood around the body which carrys out oxygen and nutrients while extreting carbon dioxide (CO2) and waste products

Coronary artery-veins

The vessels which supply directly to the muscles of the heart. They originate in the bulb of the aorta, behind aortic valve cusps (aortic sinus). All cardiac veins drain via coronary sinus into the right atrium

Myocardial infraction (Heart attack)

The condition occurs from blocked coronary artery which decreases blood flow to discrete regions on the myocardium which becomes necrotic (dead). The function of myocardium is compromised. MI’s have a high mortality rate and if it does not the consequences are life-threatening and shorten life expectancy

Function of right atrium

Opening of coronary sinus into right atrium (valve of the CS or the thebesian valve). Auricles or atrial appendages work as high density of pectinate muscles which makes them an area of contracile force. They expand to act as an emergdency reservoir for increased venous return

Function of the right ventricle

Tricuspid valve, papillary muscle, chordae tendinea and trabeculae carnaea

Left atrium

Openings consist of 4 pulmary veins and left atrio-ventricular (mitral) valve. With pectinate muscles

Left ventricle

Opening of aorta, left atrio-ventricular opening with bicuspid (mitral) valve, papillary muscles