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www.GOALias.blogspot.comMilk teeth and permanent teethDo you remember about falling of your teeth some years ago? The first set ofteeth grows during infancy and they fall off at the age between six to eightyears. These are termed milk teeth. The second set that replaces them are thepermanent teeth. The permanent teeth may last throughout life or fall offduring old age.MolarBoojho is fascinated by thehighly coiled small intestine seenin Fig. 2.2. He wants to know itslength. Would you like to make awild guess? We have given itsapproximate length on page 16.Just imagine how such a longstructure is accommodated in asmall space within our body!PremolarCanineIncisorthe body is called ingestion. We chewFig. 2.3 Arrangement of teeth and differentthe food with the teeth and break it downtype of teethmechanically into small pieces. Eachtooth is rooted in a separate socket in which ones for piercing and tearing?the gums (Fig. 2.3). Our teeth vary in Also find out the ones that are used forappearance and perform different chewing and grinding?functions. Accordingly they are given Record your observations in Table 2.2different names (Fig. 2.3).Table 2.2Activity 2.2Type of teethNumber of teethTotalWash your hands. Look into theLower jawUpper jawmirror and count your teeth. Use Cutting andyour index finger to feel the teeth. biting teethHow many kinds of teeth could you Piercing andfind? Take a piece of an apple or tearing teethbread and eat it. Which teeth do Chewing andyou use for biting and cutting, and grinding teethNUTRITIONIN ANIMALS1313