MinuteEarth Explains: Poop

TL;DR

Fetuses do poop in the womb, but their waste products are mostly filtered and taken care of by the mother. Animals, including humans, have interesting relationships with poop, with some species even consuming their own waste. Fecal transplants have emerged as a promising treatment for certain medical conditions.

Transcript

Hi, this is Kate from MinuteEarth, coming to you “live” from my house again. Over the years, MinuteEarth has made a lot of crappy videos. Wait, no, let me rephrase that – we’ve made a lot of videos about crap. So, whether you're feeling pooped out or like a king - or queen - on the throne, we hope you’ll enjoy these four science stories, starting w... Read More

Key Insights

• 🫣 Fetuses do pee in the womb and drink amniotic fluid, which contains their own urine.
• 🪗 Waste products from the fetus, such as excess nitrogen, are filtered through the umbilical cord.
• 🍳 Feces in a fetus's digestive system are mostly broken down by acidic bile, resulting in meconium.
• 🤢 Humans have a natural disgust response to feces, which impacts their perception and decisions regarding waste management.
• 🤢 Recycling wastewater, even if it is safe to drink, can still trigger disgust due to the association with feces.
• 🤢 Disgust can be reduced by time and distance, as shown by people's increased willingness to drink recycled water if it has been stored in reservoirs first.
• 🍉 Rebranding recycled water with positive terms, like "NEWater," can also improve acceptance.

Questions & Answers

Q: Do fetuses pee and poop in the womb?

Yes, fetuses start peeing around two months of development and drink amniotic fluid that contains their own urine. Waste products are filtered through the umbilical cord by the mother.

Q: Is poop safe to eat?

Healthy poop is generally safe to consume, but it is not commonly consumed by humans due to the natural disgust response. However, certain animals, such as dung beetles and flies, rely on poop as a nutrient source.

Q: What is the purpose of fecal transplants?

Fecal transplants involve transferring healthy gut bacteria to a patient with certain medical conditions, like C. diff infections. This procedure has shown positive results in restoring the patient's digestive system.

Q: Why do humans have a disgust response to feces?

Humans evolved to be easily disgusted to protect themselves from consuming spoiled food or feces, which can be harmful. Even with rational knowledge of safety, the disgust response still influences decision-making.

Summary & Key Takeaways

• Fetuses do pee and poop in the womb, but urine is sterile and waste products are primarily filtered by the mother.

• Some animals, such as dung beetles and flies, rely on poop as a source of nutrients.

• Humans have a natural disgust response to anything related to feces, which impacts decisions and perceptions of wastewater recycling.

• Fecal transplants, where healthy gut bacteria are transferred to treat certain illnesses, have shown promising results.