What is the overall trend in the prevalence of CVD in the U. S population?

Overall, cardiovascular disease is comprised of coronary heart disease, heart failure, stroke and high blood pressure. Excluding high blood pressure, CVD prevalence among adults in the U.S. is 9 percent overall (24.3 million in 2016).

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)]