第三节循环糸统 The Circulatory System
第三节 循环系统 The Circulatory System
第三节循环糸统 动物循环糸统的演化 水管糸统 血液循环糸统 人的血液循环糸统 心血管糸 淋巴糸
第三节 循环系统 一、动物循环系统的演化 水管系统 血液循环系统 二、人的血液循环系统 心血管系 淋巴系
u中o销p091NeD 动物循环糸统的演化 (一)水管糸统( Canal system) 海绵的水管糸统是动物界最早出现的 运输糸统 腔肠动物有发达的水管糸统,称为胃水 管糸统,运输浮游生物、水中CO2,O2 和代谢废物。 Radial u382 transport in the jellyfish Aurelia. The mouth leads to perborate gastrovascular cavity(shown in colon) th stanches radiating to and from a circular canal Cil wad cefls lining the cavity circulate fluid in the directions tated by the arrows. The animal is viewed here from
一、动物循环系统的演化 （一）水管系统（Canal system) 海绵的水管系统是动物界最早出现的 运输系统 腔肠动物有发达的水管系统，称为胃水 管系统，运输浮游生物、水中CO2 , O2 和代谢废物
●●●●● (二)血液循环糸统 ●●●● ●●0 Tubular heart ●●● 无脊椎动物的血液循环糸统 ●●●● 最早也是最初级的循环糸统是纽虫的循环->元 余统 环节动物:闭管式循环糸统 软体动物和节肢动物:开管式循环糸统 Dorsal vessel (b Figure 38.3 Open and closed circulatory systems of inverte- brates.(a) Grasshoppers and other arthropods have a open circulatory system, in which the hemolymph has direct contact with the body tissues. Circulation is driven by the pumping of tubular hearts and by movement of he animal Hemolymph enters the hearts through pores called ostia when the hearts relax, and it is pumped out when the hearts contract (b)in the closed circulator system of the earth worm, blood is confined to vessels The dorsal and ventral vessels carry blood anteriorly and posteriorly, respectively, and are connected by large ves- sels that loop around the digestive tract The dorsal ves gel functions as the main heart Five pairs of the con- necting vessels act as auxliary hearts
（二）血液循环系统 无脊椎动物的血液循环系统 最早也是最初级的循环系统是纽虫的循环 系统 环节动物： 闭管式循环系统 软体动物和节肢动物：开管式循环系统
●●●●● ●●●● ●●0 ●●●● 脊椎动物的血液循环糸统 (1)鱼类的血液循环: 心脏分四室,从后往前依次顺序为: 静脉窦 心房或心耳 心重 动脉锥 FIGURE SL13 The heart and rirrulatinn ef fish. (a) Dharne of hechler in were with eah ethr( nated)is shemen n nd blood low n amgen (len is sheen in Har
脊椎动物的血液循环系统 （ 1）鱼类的血液循环： 心脏分四室，从后往前依次顺序为： 静脉窦 心房或心耳 心室 动脉锥