9. Gravity and other forces affect movement within an animal's body. Which system is responsible for the
force that moves blood through the body?
Endocrine system
Circulatory system
Skeletal system
Nervous system

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing