Breathing problems can result from asthma, infections, heart issues, or allergies. Learn causes, symptoms, diagnostic tests, and how they're treated.| WebMD
Understand the key differences between healthy lungs and smoker's lungs. Discover how smoking damages lung tissue and increases the risk of respiratory disease.| WebMD
Your skin is a complex organ. Explore its layers and how each functions, from the epidermis to the subcutis. Learn key tips for healthy skin and the roles of collagen, elastin, and keratin.| WebMD