Question

what is a centriole ?

Answer 1

cylindrical cell structure

Answer 2

To make new humans, we have to get a sperm and an egg together. But how does that sperm find its way to the egg? It has to swim quite far using a flagellum. Once it's at the egg, they have to start dividing millions of times to make a new human. How does this miracle of life happen? Surprisingly, the answer is centrioles.
First, to understand what a centriole is and what it does, we first need to understand the parts of a cell. Cells are the basic building blocks of life. All living things are made of cells. Within cells, there are tiny working parts called organelles. Organelles each have a different job in the cell. A centriole is an organelle that helps cells divide, or make copies of themselves.
Centrioles are only found in animal cells. All centrioles are made of protein strands called microtubules. Centrioles are made of nine triplets of microtubules arranged in a cylinder. Think of each microtubule like a plastic PVC pipe. The pipes are arranged with three put together in a triplet, then nine of those triplets are glued together to form an even bigger pipe. When two centrioles come together, they usually make a right angle.