NEET BIOLOGY

Detailed explanation-1: -Vertebrates are animals that have backbones and an endoskeleton (skeleton inside their bodies). In contrast, invertebrates are animals that do not have backbones. Invertebrates can have a skeleton outside their bodies called an exoskeleton, while some invertebrates have no skeleton at all!

Detailed explanation-2: -Vertebrates are animals that possess a vertebral column or “backbone”. This, along with the rest of the animal’s skeleton, comprises a support frame for the body and helps to protect vital organs. Additionally, the skeleton allows for muscle and ligament attachment and aids in movement.

Detailed explanation-3: -Endoskeleton. An endoskeleton is a skeleton that consists of hard, mineralized structures located within the soft tissue of organisms. An example of a primitive endoskeletal structure is the spicules of sponges. The bones of vertebrates are composed of tissues, whereas sponges have no true tissues (Figure 19.4).

Detailed explanation-4: -All vertebrates have an inner skeleton, including a skull, backbone, and ribs.

Detailed explanation-5: -An animal that has a backbone and skeletal system is called a vertebrate. Vertebrates are animals with backbones and skeletal systems.