Vertebrates vs. Invertebrates: Body Structure Differences

Vertebrates:

• Vertebrates have a well-defined internal skeleton made of bones or cartilage.
• They have a segmented backbone or spinal column that protects the spinal cord.
• Most vertebrates have paired appendages (limbs) that are jointed and used for locomotion.

Invertebrates:

• Invertebrates do not have a backbone or internal skeleton made of bones.
• They may have external skeletons (exoskeletons) made of chitin or other materials for support and protection.
• Invertebrates exhibit a wide range of body structures, including soft-bodied forms like octopuses and hard-shelled forms like insects.

Overall, the main difference in body structure between vertebrates and invertebrates lies in the presence or absence of a backbone or internal skeleton. This fundamental distinction separates the two major groups of animals in the animal kingdom.