Different individuals have different levels of physical fitness.
Russ is a doctor who specializes in treating childrens illnesses and injuries his job title is best described as a pediatrician.
The salivary glands, liver and gall bladder, and the pancreas aid the processes of ingestion, digestion, and absorption. These accessory organs of digestion play key roles in the digestive process. Each of these organs either secretes or stores substances that pass through ducts into the alimentary canal.
