Question

Which of the following organ system involves in the exchange of gases with the environment?

• A. Digestive system
• B. Respiratory system
• C. Circulatory system
• D. Endocrine system
• E. Nervous system

Answer 1

Answer: (B)

Respiratory system

The digestive system includes alimentary canal and associated glands to carry out the digestion of food and release the energy stored in these food substances. The primary function of the respiratory system is to allow atmospheric oxygen from the air to enter the blood and carbon dioxide from the blood to exit into the air. The endocrine system includes endocrine glands and maintains the homeostasis of the body through hormonal actions. Nervous system serves in the reception of sensory input followed by their integration in the brain and spinal cord and generation of motor output to produce the response. Thus, the correct answer is B.