Help me with this please

A. Type of rose bush

B. The number of flowers on each bush

C. Sunlight ,Amount Of Water, Temperature

your answer is "the 1950's"

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.