The cardiovascular system transports carbon dioxide to the lungs and other waste products to the kidney for removal from the body.
What is cardiovascular system?
- "The cardiovascular system is a closed circulatory system seen in humans and other vertebrates."
- It includes: heart, blood and blood vessels.
- Heart is the pumping organ of our body. It has 4 chamber, 2 auricles (right and left) and 2 ventricles (right and left).
- The right auricles receives deoxygenated blood (blood rich n carbon dioxide) from all parts of the body, which flows into right ventricles from where it travels to lungs and gets oxygenated (blood rich in oxygen) and comes back into the left auricle, from their it flows into left ventricles and it get transported to body parts through aorta and blood vessels.
- The carbon dioxide then moves out from our body during exhalation.
- The blood helps in transportation of nutrients and oxygen to the other body parts and also removes waste product.
- The impure blood when reaches to kidney gets filtered, where essential minerals and salts are absorbed and waste product goes into collecting duct from where it is removed from our body via urethra.
Hence, the correct option is: D. Kidneys.
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