the notochord provides support in early embryonic stages and the evolutionary ancestors of vertebrates, a 'proper backbone' is made up of the neural tube and the discs in between each spine segment are derived from the notochord.
Animals with a backbone belong to the phylum Chordata. This phylum includes vertebrates such as fish, amphibians, reptiles, birds, and mammals, which all possess a notochord or backbone at some stage in their development.
The notochord is a flexible rod found in the embryos of all chordates, and is replaced later in life by the vertebral column and the main axial support of the body. If the animal you are referring to is an adult and lacking a "true notochord", it is still a chordate because the notochord has simply transformed into other parts of the body. However, if it is still an embryo and STILL has no notochord, it is not a true chordate.
Chordata is the phylum of animals that have a number of features in common, but most notably a notochord (which is called a spinal cord in humans because we have a backbone, a spine, through which it is routed). All the vertebrates (animals with a backbone) are grouped within this phylum. The chordates also include a number of other animals that do not have a backbone, but do have the notochord.
The opposite of chordata is invertebrates. Invertebrates are animals without a backbone, whereas chordates are animals with a notochord or vertebral column.
Chordata is the phylum that possesses members with a notochord, which is a flexible rod-like structure that provides support. This phylum includes animals such as mammals, birds, reptiles, amphibians, and fish.
In embryos of amphibians the notochord develops into the backbone. The notochord is comprised of cells and defines the primitive axis of the embryo.
notochord
Animals with a backbone belong to the phylum Chordata. This phylum includes vertebrates such as fish, amphibians, reptiles, birds, and mammals, which all possess a notochord or backbone at some stage in their development.
Some members of the phylum Chordata, such as sea squirts, don't have a backbone, but have what's called a notochord, a precursor to a true backbone.
No, lancelets do not have a backbone. They are small, fish-like marine invertebrates that belong to the subphylum Cephalochordata and possess a notochord instead of a true backbone.
You did. Your backbone formed on the notochord. There are some fish, the lamprey, I think, that retain a notochord, These animals are chordates but not vertebrates.
Provide structure and strength for locomotion and protection for the notochord/spinal cord.
The notochord is a flexible rod found in the embryos of all chordates, and is replaced later in life by the vertebral column and the main axial support of the body. If the animal you are referring to is an adult and lacking a "true notochord", it is still a chordate because the notochord has simply transformed into other parts of the body. However, if it is still an embryo and STILL has no notochord, it is not a true chordate.
Provide structure and strength for locomotion and protection for the notochord/spinal cord.
I believe it's a spine or backbone.
The goat is in the phylum Chordata, which means that it is a chordate. A chordate is an animal that had a notochord at some time in it's life. A notochord is a flexible, primitive structure, sort of like a primitive backbone.
An animal that would be defined an invertebrate would be any animal lacking a backbone or a notochord.