Which challenges do countries face in limiting the spread of communicable diseases?

lack of available healthy food
increase of worldwide travel
decrease of available clean water
increase in migration of infected animals

The lungs are a. divided into seven lobes b.divided into nine lobes c.separated by the mediastinum d. connected by the mediastinum

Fats are the most concentrated form of

Matching: 1. first used by europeans as a local anesthetic; now abused for its euphoric effects 5 marijuana 2. found in coffee beans, tea leaves, and cocoa beans 2 heroin 3. prescribed for pain involving serious injury or surgery 1 morphine 4. illegal derivative of morphine that is sold on the street as a white powder 6 caffeine 5. can evoke feelings of terror and panic 4 lsd 6. causes user to experience a conscious dreamlike state 3 cocaine