Where would you start when describing the blood flow through the circulatory system? (mainly the heart) i need to know because i'm writing a paper about the blood flow of the circulatory system from the perspective of a red blood cell. 8th grade biology

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil