Answer:
Oxygen passes from inside the alveoli through the thin walls and dif- fuses into the blood. At the same time, carbon dioxide waste passes from the blood into the alveoli.
Explanation:
In 2000, 25.7% of US men and 21.0% of women were smokers.
Answer:
Drug and alcohol use can harm the health of a person with HIV. Specifically, drug and alcohol use can weaken the immune system and damage the liver. People with HIV take a combination of HIV medicines (called an HIV treatment regimen) every day to stay healthy.
Explanation:
Nan because of her history with breast cancer