Americans average calories of foods with no important nutrients per day.
a. 200
b. 400
c. 600
d. 800

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Occurs when the immune system attacks the body. lupus cancer sickle cell disease huntingtons disease

Which statement best illustrates that problem solving can create new medical devices? robert hooke was in charge of verifying the information that was sent to the royal academy. william harvey did experiments with apes to learn about the circulatory system. the stethoscope was invented because the physician did not want to put his head on women's chests to listen to their heart and lungs. anton van leeuwenhoek was a very curious man and looked at just about everything under this microscope.