Anyone who has ever looked closely at the teeth of a sea urchin、There may be fewer than expected.。I was born in a fishing village and since I was a child、Sea urchin teeth are quite sharp、It's huge、I thought so, but I was too absorbed in eating.、I didn't observe it well.。
Sea urchins have 5 teeth (may vary depending on the species)、so that the tips gather at one point in the center、arranged in a regular pentagon。Each one has a calcareous sheath with plaques and、Made of calcite nanoparticles、It is made of two parts: a super hard sharp sword part.。These hard teeth not only cut out seaweed such as kelp and carcasses of fish, but also eat them.、carve the rock、Create your own hideout。
His teeth are large compared to his body.、Five teeth alone account for more than 10% of the total body volume.。It has an automatic sharpening structure.、New teeth slide out.。It is an excellent product that cannot be matched by half-baked modern tools.、It is said to be the subject of research into cutting tools.。
Thorns are people、It is a defensive weapon for things other than fish that like it.、If we had evolved to be able to use this mouth (teeth) for attack.、We must have been the ones who got eaten.。
