??? ?The digestive system extends from mouth to the anus. ??? ?It receives food, breaks it down to nutrients, absorbs nutrients into blood stream and eliminates undigested food from the body. ??? ?It consists of mouth, throat, esophagus, stomach, small intestine, large intestine, rectum and anus. ??? ?Organs that help digestion but lie outside the [...]
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Our body?s respiratory system sustains life. Process of oxidation burns molecules in food to produce energy; for this a body needs oxygen. The respiratory system enables oxygen to enter the body and carbon ? di ? oxide to exit from the body. Upper respiratory tract consists of Nasal passage, pharynx, larynx and sinus. Lower respiratory [...]
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