What is an example of cell division at work? a. amylase breaks down food. b. liver produces bile. c. oxygen and co2 are exchanged in lungs. d. red blood cell count increases.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]