A drop in the number and productivity of workers :/
Sedentary lifestyle, alcohol and other drug use, sexual activity, behaviors that cause injuries, tobacco use, poor eating habits
Answer:
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.
This is very true all of the above
