爬行动物 英文ppt.pptx

REPTILES;In the world,there are more than 6000 species of reptiles that we know Such as snack,crocodile，lizard，turtle;what is a reptile？;reptiles have head neck trunk limps tail;;reptiless have strongly bone to offer a condition to support the body ，protected the internal organs and inprove athletic ability ; reptiles have two atrium and one ventricle（but crocodiles have two atrium and two ventrice ） they breath use lungs but the pharynx and the larynx are detached，this make they can while eating and breathing;reptiles are dioecism each one only having one type of sexual organ not a hermaphrodite（most of plants and flatworms are hermaphrodite）they be pregnant by internal fertilization and they come from eggs;THANKS