The main functions of the circulatory system is to O coordinate all actions and reactions of the boy using electrical signals
support and protea delicate organs such as the brains, lungs, and heas
pumpaygen and nutrients through the blood to every part of the body
Totect the body against invading organisms and infectious diseases

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

What molecules does hemoglobin decay into over time