So you won't sprain any muscles or hurt yourself.
Answer: carbon monoxide,hydrogen cyanide
Explanation:
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.
Including lifestyle activities in a personal fitness program can be beneficial because it increases the total amount of time spent on fitness activities in a given day without requiring much additional time. For instance, an individual might walk up a flight of steps each day instead of taking the elevator. These types of activities require less commitment than more formal fitness activities and are therefore typically more convenient.
