TED-Ed: How mucus keeps us healthy - Katharina Ribbeck

Mucus is a vital substance produced by the body, covering wet surfaces like eyes, nose, and lungs. It serves multiple functions, such as protecting tissues, lubricating eyes, and shielding the stomach lining. Mucus contains mucins, which are glycoproteins that help it stay hydrated and form barriers against pathogens. It acts as the body's first defense line, preventing harmful bacteria from forming biofilms. During infections, mucus production increases to flush out pathogens, aided by white blood cells. Despite its association with illness, mucus supports beneficial bacteria that aid in health maintenance. Overall, mucus is essential for keeping the body healthy and protected.

What is one of the primary functions of mucus in the body?

• To lubricate the skin

• To dry out tissues

• To increase body temperature

• To protect delicate tissues from infection

What are mucins primarily responsible for in mucus?

• Giving mucus its color

• Providing a slippery feel

• Reducing mucus production

• Increasing mucus acidity

How does mucus help prevent the formation of biofilms?

• By increasing the body's temperature

• By drying out the bacteria

• By containing mucins and antimicrobial peptides

• By reducing the production of white blood cells

What happens to mucus production when the body detects harmful microbes?

• It stops completely

• It increases to flush out the offenders

• It remains the same

• It decreases to conserve energy

What beneficial roles do non-harmful bacteria in mucus play?

• They dry out the mucus

• They cause infections

• They synthesize vitamins and suppress inflammation

• They increase mucus acidity