The heart pumps through the blood . the blood carries food and a gas called in one direction. it takes food, cells and the gas in another direction ​

b because they naturally adapt to their environment plz mark brainliest

explanation:

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

answerblank(1); afferent neurons; blank(2); efferent neurons;