The circulatory, or cardiovascular system, is composed of
a. the lungs, heart and brain.
b. the lungs, blood vessels and heart.
c. the heart, blood and blood vessels.
d. the heart, arteries and veins.

The presence of aids in a community often increases its level of property what is one of the main reasons for this

What should be changed to make the following sentence true? "the stress model suggests that people with a predisposition for a disorder are more likely to develop the disorder when faced with stress."

Insulin is a peptide therapeutic used to manage type 1 diabetes, which affects more than 20 million people worldwide according to the international diabetes federation. a significant limitation to the broad distribution and use of insulin to treat type 1 diabetes is the fact that it must be administered by injection rather than orally. why is insulin administered by injection and not orally?