This illustration shows the major cell types affected by cellular senescence in various skeletal diseases. As the body ages, senescent cells accumulate in different tissues—including bone, cartilage, ...

Cropped shot of a female doctor showing result of radiography on digital tablet to patient and giving diagnosis. Doctor talking to patient about medical treatment after surgery. This story is part of ...

The cardiovascular system consists of the heart, blood vessels, and blood. Its primary function is to transport nutrients and oxygen-rich blood to all parts of the body and to carry deoxygenated blood ...

Medically reviewed by Katrina Carter, DPT Key Takeaways Voluntary muscles can be controlled by the person, like muscles in your neck and legs. Involuntary muscles work without you thinking about it, ...