The lungs are major organs of which organ systems? the respiratory and endocrine systems
the digestive and cardiovascular systems
the excretory and respiratory systems
the cardiovascular and immune systems

The dietary guidelines for americans recommend (a) avoiding smoking. (b) engaging in aerobic exercise for 60 minutes at least five days a week. (c) making all of your grain choices whole grains. (d) increasing your intake of fruits and vegetables.

Can roller backpacks be dried in the dryer?

How do i stop staring at people if i have a staring problem?