In jumans oxygen enters the body and carbon dioxide leaves it through the lungs. the lungs are made of thousands of tiny air sacs surrounded by blood vessels. how does this the teo gases to diffuse quickly into and out of the blood?

Assume you were going to teach this information to a group of seventh graders. pick a title for your presentation that would make the seventh graders want to listen to you.

Which finger should not be used when measuring heart rate?

Which of these is a sexual stereotype? a) on average, males are taller than females. b) people over the age of 60 are not interested in sex. c) male hormone levels differ from those of females. d) there are more male representatives than female representatives in congress.