Final answer:
The sticking-up part in the center bottom of the nose is the dorsum nasi, a structure supported by the nasal bone, which connects the bridge to the apex of the nose.
Step-by-step explanation:
The sticking-up part in the center bottom of the nose is known as the dorsum nasi, which is the intermediate portion of the external nose that connects the bridge to the apex. This section is supported by the nasal bone and is covered by skin. The structure of the dorsum nasi plays a critical role in the shape and function of the nose, which includes breathing and helping to filter the air that enters the nasal cavity.
Underneath the skin of the nose lies the skeletal structure. The nasal bone is a pair of bones that forms the bridge of the nose, articulating with the frontal bone and maxillary bones. The nasal bone supports the cartilages that form the lateral walls of the nose. When a nose is broken, it is typically the nasal bone that is damaged.