<span>a medical condition in which the bones become brittle and fragile from loss of tissue, typically as a result of hormonal changes, or deficiency of calcium or vitamin D</span>
Osteoporosis is <span>a medical condition in which the bones become brittle and fragile from loss of tissue, typically as a result of hormonal changes. </span>Our bones store calcium in addition to providing support for our bodies.
they trace species origins back and find common point and every time they do, they connect them on the line, creating something that looks like "branches" google "cladogram"
