Where does the cilium and flagellum emerge from?

Centrioles:

Centrioles are barrel-shaped structures essential for the development of centrosomes, cilia, and flagella.

Location of centrioles:

1. The basal body is also referred to as the basal granule, the kinetosome, and the blepharoplasty in earlier cytological literature.
2. A cilium or flagellum made of eukaryotic cells has a protein structure called a basal body.
3. The axoneme microtubules grow at a spot called the basal body.
4. The basal body gives rise to the cilia and flagella.