Describe how the nervous system keep you cool when it is hot outside

feral cats are estimated to eat tens of millions of native animals each night in australia

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.