including how to check for breathing and what to do in an emergency. Someone who is unresponsive won't answer or move if you call their name or tap their shoulders. If it's an adult who is ...

The sleeve Blood vessels are surrounded by a layer of smooth muscle that helps regulate blood flow. In healthy lungs, this muscular sleeve ends midway along the length of arterioles, which branch into ...

When inflammation in the lungs is chronic, it can cause scarring. This scar tissue can prevent oxygen from moving easily from your lungs into your blood and may cause diffuse (widespread) interstitial ...

When those primary cancer cells travel to your lungs, it’s called lung metastatic or secondary lung cancer. It’s a life-threatening condition. And it’s found in about a third of the people ...

Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

Like smoking tobacco, smoking weed or cannabis can also have damaging effects on the lungs, although research on the subject is not as clear-cut. Smoking is one of the biggest threats to lung health.