Marijuana use can affect several body systems. Here are three that are commonly discussed in medical and public health sources:

• Respiratory system: Smoking marijuana can irritate the airways and lung tissue, increasing the risk of chronic bronchitis, coughing, wheezing, and respiratory infections. Regular use may worsen airway inflammation and mucus production.

• Cardiovascular system: THC can cause acute increases in heart rate and blood pressure, and there is concern about longer-term effects on cardiovascular health, including potential arrhythmias and vascular effects in some individuals.

• Immune/inflammatory response: Some evidence suggests marijuana smoke can modulate immune function and inflammatory pathways, potentially impacting the body’s ability to respond to infections or other immune challenges, especially in immunocompromised individuals.

If you’d like, I can tailor these to a particular context (e.g., clinical concerns, pregnancy, or pediatric considerations) and provide brief notes on the strength of the evidence for each.