No, octopuses do not have vertebrae. They are invertebrates, which means they lack a backbone. Instead, their bodies are soft and flexible, allowing them to squeeze into tight spaces and adapt to various environments. Their unique anatomy includes a central body, eight arms, and a beak-like mouth, but no skeletal structure.
A vertebrate is an animal with a vertebra. A vertebra is a spine. Examples of vertebrates would be apes, birds, snakes and fish. An invertebrate does not have a spine. Examples - a slug, an octopus, an ant.
Cervical vertebra
A kangaroo is a vertebra.
The seventh cervical vertebra is called as vertebra prominens. This vertebra has the long and prominent spine. This spine can be felt at the joint of the neck and thorax.
The c5 vertebra is located in the lower part of the neck, just below the c4 vertebra. The c4 vertebra is slightly higher up in the neck compared to the c5 vertebra.
Body (of the vertebra)
There are 5 lumbar vertebra
Body of the vertebra. It is fused with the Axis vertebra. Axis being the second vertebra.
cervical vertebra
spondylolisthesis
Cervical 1 vertebrae
The name of the second vertebrae is called the axis.