Wp/kaj/Ryya

Ryya Kap a ni nkpa yyit ba̱sok ba a̱ kat rwam. Ryya na yet bu̱ tswa a̱ccip u̱ sshi ka̱yat a̱kpak nkyang byyi sso. Baneywu bu nyam zaan bu nanon rya na byi naswang nanaai, ahwa anntazwa bu ahwa katak ka. Hywon u byi naswang nahw awon akpak nkyang kwang kabyen a byyi naswang natat. Akunkrang ryya a byyi rang basok kassu kayring nyi na basok ba nwwai u ryya na ni rot natwwong a an bvwo basik ba brak ruryim ni.

The heart pumps blood with a rhythm determined by a group of pacemaker cells in the sinoatrial node. These generate an electric current that causes the heart to contract, traveling through the atrioventricular node and along the conduction system of the heart. In humans, deoxygenated blood enters the heart through the right atrium from the superior and inferior venae cavae and passes to the right ventricle. From here, it is pumped into pulmonary circulation to the lungs, where it receives oxygen and gives off carbon dioxide. Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta into systemic circulation, traveling through arteries, arterioles, and capillaries—where nutrients and other substances are exchanged between blood vessels and cells, losing oxygen and gaining carbon dioxide—before being returned to the heart through venules and veins.[11] The heart beats at a resting rate close to 72 beats per minute.[12] Exercise temporarily increases the rate, but lowers it in the long term, and is good for heart health.[13]