Heart rate, color, irritability, muscle tone, and breathing
<span>Stomach. Stomach which connects oesophagus to small intestine is the main part of digestive system where digestion occurs. Protein is a necessary food content for the healthy being of body. From the food proteins are liberated and its chemical digestion starts in the stomach.</span>
The lungs can show aging!
Answer:
2 because the central nervous system includes the brain, cerebellum, cerebrum, brain stem, etc.
