• General function of the system and how the organ system contributes to physiological homeostasis of the human organism
• How the organ system (circulatory) does interacts with other organ systems in the human body.
• Organs in this system and its functions.
• Representative organ – its structure (including cells and tissues) and how the structure relates to the specific function of the organ.
• One disease and how it affects the system and human health.
The Circulatory System The circulatory system circulates blood throughout all the organs in the human body; and blood delivers oxygen and nutrients to every single cell and picks up waste and carbon dioxide from these cells it passes through. The heart (main system’s organ) pumps blood to the organs, cells and tissues of your body through arteries, arterioles, and capillaries and it is sent back to the heart through veins and venules (Texas Heart Institute, 2010).
The human body has a closed circulatory system where blood is confined to the heart and blood vessels which branch elaborately throughout the tissues and organs of the body to allow exchange of nutrients and wastes. The circulatory system performs the following functions which contribute to the physiological equilibrium of the human organism and interaction with other systems such as digestive, lymphatic, respiratory (lungs), etc:
• Transports oxygen from the lungs and gills to the tissues, and transports carbon dioxide from the tissues to the lungs or gills.
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