Digestive Processes and Waste Elimination

Emily from MinuteEarth explains why our waste is brown or yellow, despite colorful diets. The body recycles red blood cells, reclaiming iron and converting the rest into bilirubin. Bilirubin cycles in the body until gut bacteria convert it to urobilinogen, which exits via urine or feces. The video concludes with a rhyme and a message supporting Tab for a Cause.

What colors do the things we eat and drink turn into after digestion?

• Black and white

• Green and purple

• Brown and yellow

• Red and blue

What happens to red blood cells after they become too stiff and inflexible?

• They turn into white blood cells

• They are engulfed by white blood cells

• They are repaired by the body

• They are expelled from the body

What molecule is formed when red blood cells are broken down?

• Chlorophyll

• Bilirubin

• Urobilinogen

• Hemoglobin

What happens to bilirubin if left to its own devices in the body?

• It forms an infinite loop

• It turns into iron

• It becomes a nutrient

• It is expelled immediately

What role do gut bacteria play in the digestion process?

• They produce red blood cells

• They break down bilirubin

• They absorb iron

• They create new blood cells

What happens to urobilinogen in the first route of waste elimination?

• It is absorbed by the intestines

• It is stored in the liver

• It is turned into a brown molecule

• It is processed by the kidneys

In the second route of waste elimination, what color does urobilinogen turn into?

• Green

• Red

• Yellow

• Dark brown

What is the poetic summary of the digestion process?

• Roses are red, waste is blue

• Roses are red, digestion is new

• Roses are red, red blood cells are too

• Roses are red, violets are blue

What is the main purpose of the Tab for a Cause browser extension?

• To improve browsing speed

• To enhance security

• To donate to charity

• To block ads

How much money has been raised for charity through Tab for a Cause?

• $100,000

• $200,000

• $300,000

• $400,000