Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird

Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports