I have two questions, 1. The circulatory system interacts with other body systems. How does the circulatory system help the excretory system and the digestive system do their jobs?
2. Choose one system and explain what would happen to a runner if that system failed to work properly.
Answer these two simple questions with a simple and unique answer, thanks!

2. evaluate how each of the following affects your personal physical fitness and dietary practices. (3 points: 0.5 points for each) your school your community your family and culture your friends any media and advertising you see your emotions

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer

Asoccer mom is driving her 75 year old grandmother and her 9 year old daughter home after the game. the grandmother and daughter were both in the back seat and both were wearing their seat belts. a car ran a red light in front of them, causing them to t-bone that car on the passenger side. fortunately there were no serious injuries, but the grandmother did sustain several rib fractures. the mother, daughter and driver of the at-fault car were shaken up but unhurt. what are some possible reasons that the grandmother sustained rib fractures while the other victims did not?