21 Complete the following table. Organ System Description Function tongue digestive system pushes the bolus into the pharynx and oesophagus oesophagus stomach small intestine absorbs most of the digested food large intestine 1. ... 2. ... kidney 1. ... 2. ... 3. ... ureter bladder urethra 22 Look at the pictures on these two pages and practise describing both the digestive and urinary systems (organs and functions). The urinary system **Read the section "Humans" and answer the following questions. ** What are the names ofthe four regions of the stomach? What does the ability of the stomach to contract or expand depend on? Where are the gastric glands? What is chyme? 23 Follow the link of Encyclopedia Britannica: ► Stomach 1. 2. 3. 4. WHAT IS THE DIFFERENCE BETWEEN A COW'S DIGESTIVE SVSTEM ANO A HUMAN'S? Ruminant ani mais, such as cows, are herbivores, eating plant materials while humans are omnivores, eating both plant and animai materials. Plant materials are difficult to digest and take time. Therefore, a cow's digestive system is longer than that of the humans. While humans have a single stomach, cows have four stomach compartments called the rumen, reticulum, omasum and abomasum. The rumen is the largest and can hold up to 150 kilos of food and contains billions of microorganisms. They can digest fiber allowing the cow consume feeds that humans or monogastric (i.e. with a to single stomach) animals cannot do effectively. The abomasum is the stomach compartment similar to the human stomach. GLOSSARY : : : : : : : : : : : : : : : : bladder vescica bolus bolo to chew masticare duct dotto faeces feci juice succo kidney rene large intestine intestino crasso liver fegato to occur avvenire, aver luogo oesophagus esofago to release liberar reservoir deposito small intestine intestino tenue to swallow ingoiare tract tratto