Can you me with booth 14 and 15

b.have there own function.

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)]

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.

answer; nociceptive pain;