circulatory system

another name of circulatory system is ______ （多选）

• respiratory system

• cardiovascular system

• transport system

• digestive system

Answer explanation

循环系统又叫做心血管系统（cardiovascularsystem）,或者（transport system）运输系统

circulatory system is made up of _____________（多选）

• blood

• lungs

• blood vessels

• heart

function of circulatory system is _____（多选）

• provide oxygen

• provide nutrients

• remove waste

how many chambers腔 does the heart have ?

• 1

• 2

• 3

• 4

label标注 the 4 chambers腔 of heart. （请忽略图中黑色的线）

Why are left and right reversed颠倒 when we label标注 the heart?

为什么我们标注心脏时左右是颠倒的？

a flap片 of tissue that prevent阻止 blood from flowing back回流 is _____

心脏中阻止血液回流的一片组织是______

what does an atrium心房 do?

• let blood in

• force用力推 blood out

• exchange交换 gases

• remove移除 waste

what does a ventricle心室 do?

• let blood in

• force用力推 blood out

• exchange交换 gases

• remove移除 waste