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Across 1. pair of breathing organs located with the chest which remove carbon dioxide 5. The tube that connects the pharynx (throat) with the stomach. 6. A fish-shaped spongy grayish-pink organ about 6 inches (15 cm) long 8. Another name for the intestine 12. A pear-shaped organ just below the liver that stores the bile secreted by the liver. 13. The long, tubelike organ in the abdomen that completes the process of digestion. 16. The lowest part of the small intestine 17. To take something in, as through the skin or the intestine. 20. The opening of the rectum to the outside of the body.

Down 1. An organ in the upper abdomen that aids in digestion and removes waste products 2. Part of the small intestine. It is half-way down the small intestine between its duodenum and ileum sections. 3. Mainly sugars and starches, together constituting one of the three principal types of nutrients used as energy sources (calories) by the body. 4. The first part of the small intestine. 7. A small outpouching from the beginning of the large intestine (the ascending colon). 9. An uncomfortable feeling of burning and warmth occurring in waves rising up behind the breastbone (sternum) toward the neck. 10. The part of the large intestine that runs from the cecum to the rectum as a long hollow tube 11. Single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites 14. Proteins that act as a catalysts in mediating and speeding a specific chemical reaction. 15. The upper opening of the digestive tract, beginning with the lips 18. That part of the central nervous system that is located within the cranium (skull). 19. Yellow-green fluid that is made by the liver, stored in the gallbladder and passes through the common bile duct into the duodenum where it helps digest fat.