During the systole phase of the cardiac cycle, the left ventricle contracts and blood is pumped into the aorta. which of these valves prevent a backflow of blood into the left atrium? a. aortic valve b. tricuspid valve c. mitral valve

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

What advantages does a pedigree have over a written passage?