Tonsillitis rarely turns fatal, but untreated cases can lead to serious complications like abscesses, Lemierre syndrome, and heart damage. Here's what to watch for.
Your blood vessels constantly adjust their width using smooth muscle, nerve signals, and hormones like angiotensin II to control blood flow and pressure.
Your spine does far more than hold you upright. Learn how it protects your nervous system, supports movement, and why daily habits can quietly wear it down.