Gene pool is not the combined alleles of all the individuals in a population.

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)]

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

the correct answer is: " ventricles " .

{source: refer to text within question.}.

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