What is the function of a circulatory system? view available hint(s) what is the function of a circulatory system? it brings a transport liquid into close contact with all cells in the body. it exchanges oxygen and carbon dioxide with the outside air. it is the site of blood cell production. it acts as a reservoir for the storage of blood?

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing