Help please im not really good at this football stuff (American football)

Although animals share many common characteristics, there is also a great amount of diversity found in animals. which animals are ectothermic, obtain dissolved oxygen in water through gills, have scales, have fins, and live in water?

When encountering an injured victim, what is the evaluation sequence

What kind of wound occurred when the skin scrapes against a hard surface and tiny blood vessels break in the outer layer of skin