Need help asap Test!! A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass. Which statement describes the element he is studying?

The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.  

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)]