Pink mucous membranes indicate what about oxygenation?

• A. Decreased oxygenation
• B. Normal oxygenation
• C. Excess oxygen
• D. Unknown

Answer: (B)

Pink mucous membranes reflect that tissues are receiving adequate oxygen and are well perfused. When oxygen delivery is sufficient, the blood in the tiny vessels of the mucous membranes stays well-oxygenated, giving a healthy rosy color. If oxygenation were impaired, these membranes would more likely appear pale or bluish (cyanotic) rather than pink. Keep in mind that lighting, skin/mucous membrane pigmentation, and circulation can influence color, so color is most informative when considered alongside other signs like capillary refill and heart rate.