1. In the seventeenth century, Francesco Redi perronmeu expEI U16
Half of the jars were covered, and half were left open.
• Redi noticed that the meat in the sealed jars did not have maggots, but the meat in the open jars did h
Redi concluded that only flies could make more flies.

XCVB

Explanation:

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.