Red blood cells pick up oxygen in the lungs. Blood travels away from the heart and lungs through the arteries. Red blood cells drop off oxygen to the cells through tiny tubes called capillaries. Blood then returns to the heart through the veins and the cycle begins again.
False because mainstream smoke is defined as smoke from a cigarette or pipe. Second hand smoke is smoke that has been inhaled by someone then exhaled, making you the "second" one to breath it :)
B the actions are likely to lack planning and ignore consequences
Answer:
Leave the blower running for ventilation while anyone is inside. Running the Silo blower for 15 to 45 minutes before entering the silo and while you are in the silo will help remove silo gas, but this is not a substitute for a self-contained breathing apparatus.
Explanation: