Digestion
What fuel does the body use? glucose
What is the first stage of digestion? moistening food with saliva
What is the stomach made of? smooth muscle
What is gastric juice made of? hydrochloric acid
What keeps gastric juice from digesting the stomach lining? mucus
What is the purpose of bile? breaks fat into globules and neutralize gastric juices
What travels in the large intestine? water, undigested food particles
What give human waste its dark color? bile pigments
How much of human waste is made of bacteria? 25%
What microscopic structures line the small intestine? microvilli
How do food molecules get into the cells? through small openings in the cell membrane
What is the largest organ in the body? liver
What does the liver do with glucose? convert it to glycogen
What is the function of the liver? detoxification
What happens to alcohol in an empty stomach? dissolves the mucus membrane and passes into the blood stream
What happens if liver cells become damaged by virus, bacteria, or alcohol? cannot function; molecules turn to fat
Can the liver be replaced? no