Esophagus

a hollow, muscular tube that connects the pharynx to the stomach transport food (bolus) from the mouth to the stomach

keep the passage moist and make it easier for the bolus to move

series of muscle contractions starts in the esophagus and continues through the rest of the digestive tract

muscles that are found along the digestive tract open & close to allow materials to pass through

esophagus is open and food will go into the stomach when they are contracted, the esophagus is closed normally closed to prevent the acidic contents of stomach from going into the esophagus

Temporarily stores food while both mechanical & chemical digestion takes place

has thick walls - Elastic and very muscular can stretch to hold more food

Performs chemical digestion; unique to the stomach Millions of gastric glands produce gastric juice, stimulated by food.

contains hydrochloric acid, salts, enzymes, water, and mucus; highly acidic (more acidic than battery acid)

Stomach lining secretes mucus to protect it from strong acid

Three layers of muscle fibers churn food, breaking it mechanically and mixing it with gastric juice Nerves around the stomach regulate activities and start contractions to release partially digested food

name for food once it leaves stomach peristaltic wave become strong when chyme is ready to leave stomach -forces chyme out

when the small intestine is full and still digesting food, the stomach temporarily stores chyme

muscular valve at the lower end of the stomach closed - food stays in the stomach opened - food goes into the small intestine

out of the small intestine into the large intestine then chyme is pushed into duodenum

starts in the mouth with saliva digestion is completed in the stomach

starts in the mouth with saliva digestion is completed in the stomach

starts and finished in the stomach

start being digested in small intestine digestion gets completed in the small intestine