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• The respiratory and circulatory systems play vital roles in supporting the overall functioning of the human body. These systems work collaboratively with other organ systems to ensure the delivery of

  oxygen, removal of waste products, and maintenance of homeostasis.
• The respiratory system facilitates the exchange of oxygen and carbon dioxide between the body and the environment.
• Structure and Function of the Respiratory System: The respiratory systemincludes organs involved in breathing, such as the nose, pharynx, larynx, trachea, bronchi, and lungs.
• The primary function of respiratory system is to supply oxygen to the body and remove carbon dioxide through the process of respiration.
• Gas exchange refers to the diffusion of oxygen from the

  lungs into the bloodstream and the release of carbon dioxide

  from the bloodstream into the lungs.
• Oxygen enters the bloodstream, binds with hemoglobin in red blood cells, and is transported to body tissues. Carbon dioxide, produced as a waste product, is expelled during exhalation.