Why don't Sharks have Bones? + more videos | #aumsum #kids #science #education #children

TL;DR

Sharks lack bones due to their cartilage skeleton; humans don't drink seawater because of its high salt content; blood is red due to hemoglobin; nail biting is a habit with triggers, actions, and rewards.

Transcript

It's AumSum Time. Why don't sharks have bones? Sharks belong to a special class of animals called Chondrichthyes. The skeleton of these animals is not made of bones, instead it is made of cartilage. What? Cartilage is the same stuff that our ears and nose are made up of. And it is due to this material that sharks are able to skilfully maneuver in w... Read More

Key Insights

• 💦 Sharks have cartilage skeletons for weightlessness and flexibility in water.
• ✋ Seawater is avoided due to its high salt content causing dehydration.
• 😪 Blood's red color comes from hemoglobin binding with oxygen.
• 💅 Nail biting is a habit formed by triggers, actions, and rewards.
• ⚾ Animal blood color varies based on proteins like hemoglobin and hemocyanin.

Questions & Answers

Q: Why do sharks have cartilage skeletons instead of bones?

Sharks have cartilage skeletons because cartilage is lighter and more flexible, allowing them to maneuver skilfully in water.

Q: What happens to our cells when we drink seawater?

Drinking seawater increases salt levels outside cells, causing water to flow out and cells to shrink, leading to dehydration.

Q: What gives blood its red color?

Blood is red due to hemoglobin binding with oxygen, resulting in a color change; other animals have different proteins leading to varied blood colors.

Q: Why do people bite their nails?

Nail biting can be a habit triggered by broken nails causing pain, with biting as the action for relief, and the removal of the nail acting as the reward.

Summary & Key Takeaways

• Sharks have cartilage skeletons, not bones, which makes them lighter and more flexible in water.

• Drinking seawater is harmful due to its high salt content, causing dehydration and cell shrinkage.

• Blood is red due to hemoglobin binding with oxygen; animals vary in blood color based on proteins like hemocyanin.