Cartilage is replaced by bone in a process called

Which description best defines the nervous system and its two main branches? a: the message center of the body, split into the autonomic nervous system and the somatic nervous system b: the control panel of the body, split into the central nervous system and the exterior nervous system c: the message center of the body, split into the central nervous system and the peripheral nervous system d: the control panel of the body, split into the brain and the spinal cord

The breakdown of peptides into amino acids is an example of . the release of insulin after eating a large meal is an example of .

The first step in treating water from a river or lake is usually