10. What is the primary responsibility of the upper respiratory tract? OA. The internal exchange of gases
OB. The delivery of oxygen throughout the body
OC. The contractions and relaxations that initiate the lungs' inhalation and exhalation
OD. The intake and filtering of oxygen from the environment

According to your text, the best way to reduce the number of germs is by ventilating spaces and a. cleaning all toys, books, and materials every day. b. keeping all potentially sick individuals out of the center. c. minimizing strenuous physical activity among the children. d. cleaning, sanitizing, and disinfecting surfaces and materials.

Minute vessels that collect blood from the capillaries and join to form veins are: venoles venules viscera venoids

You should expect adults to respect you in return. true false