Blood enters the left and right coronary arteries directly from which blood vessel or heart chamber?

Blood enters the right and the left coronary arteries directly from THE AORTA.
Blood is supplied to the heart via the coronary arteries. The left and the right coronary arteries together with their branches carry blood to all part of the heart muscles. The left coronary artery supply blood to the left atrium, the side, front, bottom and back of the left ventricle and the front of the septum. The right coronary artery supply blood to the right atrium, right ventricle, bottom portion of both left and right ventricle and the back of the septum.

1. when the tempature rises,your sweat glands and then springs into action making perspiration. some sweat evaporates with your skin taling heat with it.2.some of the blood pumped by the heart travels by your lungs to get rid of carbon dioxide and pick up oxygen.3.saliva produces by, you drinking water which saliva is 98% of. when mucus builds up in your body it also creates saliva as well as, antibacterial compunds.4.when the core body tempature drops, the shivering reflex is triggered to maintain homeostasis. for example: when you get out the pool you start to shiver because it is cold.