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Download Human Digestive System
Transcript
Human Digestive System Functions • Ingest food • Break down food • Move through digestive tract • Absorb digested food and water • Eliminates waste materials Mouth • Breaks down food into small pieces • Begins starch digestion • Saliva produces amylase and lubricates food • Moves food into esophagus • Peristalsis moves food to stomach Salivary Glands Stomach • First opening – cardiac sphincter • Muscles churn food – more mechanical digestion. • Food leaves after 2-4 hrs • Second opening – pyloric sphincter Stomach Small Intestine • Digestion is finished here • Peristalsis finishes mechanical digestion • Pancreatic juice produces enzymes to finish chemical digestion of fats, proteins and carbohydrates Small intestine Large Intestine • Absorbs water • Bacteria live here • Bacteria produce B vitamins and Vitamin K • Stores solid waste in rectum until elimination. Large intestine Texto Thanks for your time!
