How Do Starfish Regrow Their Arms?
Starfish regrow lost arms through a process called regeneration. After an arm is injured or detached, the wound closes, cells near the injured area change their behavior, and new tissues gradually develop. Over time, the growing arm can rebuild its skeletal elements, muscles, nerves, and tube feet....
What are the echinoderms?
Echinoderms are a type of marine organism with many needle-like protrusions (spines) on their body surface and are usually covered with a hard shell. Here are some common echinoderms:1. Starfish: Also called ocean star, it is a kind of echinoderm widely distributed in the ocean. Its body is flat and...