What are the main differences between invertebrates and vertebrates?

Invertebrates and vertebrates are two major categories of animals that exhibit many differences in terms of their anatomy and physiology. Invertebrates are animals that do not have a backbone or spinal column, while vertebrates are animals that have a well-developed backbone or spinal column. Some of the main differences between invertebrates and vertebrates are:

• Anatomy: Invertebrates have a soft body, while vertebrates have a hard, bony skeleton that protects their internal organs.
• Size: Invertebrates can range in size from tiny microscopic creatures to large animals such as squids and octopuses, while vertebrates tend to be larger.
• Nervous system: Invertebrates have a less complex nervous system, while vertebrates have a well-developed nervous system that includes a brain and spinal cord.
• Circulatory system: Invertebrates have an open circulatory system, while vertebrates have a closed circulatory system.
• Respiration: Invertebrates have a variety of respiratory systems, while vertebrates have lungs or gills for respiration.

These are just a few of the many differences between invertebrates and vertebrates. Both groups of animals are incredibly diverse and can be found in a variety of habitats, from the depths of the ocean to the tops of mountains.