What role does your heart play in delivering oxygen to your body cells?

the heart breaks down carbon dioxide into carbon and oxygen.

the heart pumps oxygen-rich blood to your body cells.

the heart pumps oxygen through the alveoli, which deliver it to body cells.

the heart takes in oxygen from the environment and delivers it to cells.

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05