Scott is experiencing gallstones. the gallstones have caused cholecystitis (inflammation of his gallbladder). scott’s condition affects which body system?

Which of the following is a health risk associated with ground-level ozone? a.cataractsb.skin cancerc.respiratory illnessd.all of the above

Why is important to cover your hands and feet in cold weather? a. they are furthest from your heart. b. they are often last to receive blood flow. c. they can suffer from tissue damage in cold weather. d. all of the above

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4