Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 8 liters of natural oil for every 5 liters of synthetic oil. In order to make 728
liters of Petrolyn oil, how many liters of natural oil are needed?

Organize the stages of tissue repair in the order in which they occur, starting with the first stage at the top.

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Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases