I see a double helix and chromosomes that's all I got
They all and functions of the skeletal system huh
In 1798 the first smallpox vaccine was developed.Over the 18th and 19th centuries,systematic implementation of mass smallpox immunization culminated in its global eradication in 1979.
10, I guess. Thank you for the free points.
C. that is your answer because as your heart contracts, blood flows and IF your heart is not strong enough, it will be hard to breathe.