As body temperature rises, the human body produces sweat as a means of cooling. this is an example of?
positive feedback or negative feedback

this is math not biology xd

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.