so if i stick my fingers in my brown starfish and i feel a rough surface does that mean i have colon cancer there seems to be gas escaping every 10 minutes

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)]