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Biology : Human Organ Systems III

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Food descends from the mouth to the stomach through a muscular tube known as _______.     14
Blood is returned to the heart from various body parts through blood vessels known as _______.     2veins
_______ is the organ of smell.     3Anus
_______ is the opening in the body through which feces are excreted.     4Nose
Heart is divided into _______ chambers.     5esophagus

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