Why is the digestive system important?
A
It carries blood through the body to bring oxygen, water and nutrients to cells.

B
It changes food into molecules that cells can use for energy, growth and healing.

C
It regulates the functions of all the other body systems.

D
It interprets information provided by the senses and sends messages throughout the body.

answer; the correct answer is desert plants;

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)]