Why is the skin a good defense mechanism for the immune system?

Type the correct answer in the box. spell the word correctly. which three categories of waste is savio promoting in his city? savio has been spreading awareness about the importance of proper waste disposal techniques. he has been visiting restaurants in his city and asking them to segregate waste into three categories, garbage, organics, and . so that it becomes easy to identify waste and treat them accordingly.

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

Results from damage to tiny air sacs in the lungs