16-18.) The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system. The small intestine has three parts.
19-29.) The respiratory system consists of all the organs involved in breathing. These include the nose, pharynx, larynx, trachea, bronchi and lungs.
30-33.) The nervous system has two main parts:
• The central nervous system is made up of the brain and spinal cord.
• The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
34-38.) Breathing deeply, with a slow and steady inhalation to exhalation ratio, signals our parasympathetic nervous system to calm the body down. Long, deep breaths can also manage our stress responses to help decrease anxiety, fear, racing thoughts, a rapid heartbeat and shallow chest breathing.
38-40.) It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis. Through its receptors, the nervous system keeps us in touch with our environment, both external and internal.
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