Frequently overexercises and limits all food intake before weighing in for a wrestling match. After weigh in, he eats unusually large amounts of snack foods. Ultimately, putting his body through binge and purge sessions. It is likely that Rex is suffering from:

trachea, alveoli, lung capillaries, arteries

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)]

not: both offer magnification to the atomic level.