心脏与血液循环
Heart & Blood Circulation
详细描述循环系统：心脏有四个腔室（两个心房、两个心室），以双循环路径泵送血液——一条路径将血液送到肺部获取氧气，另一条将含氧血液输送到全身各处；血液流经动脉、静脉和微小的毛细血管。
Describe the circulatory system in detail: the heart has four chambers (two atria, two ventricles) that pump blood in a double loop — one to the lungs for oxygen and one to the rest of the body to deliver it — through arteries, veins, and tiny capillaries
学习证据 / Evidence
- 说出四个心腔的名称，并描述双循环路径（心脏→肺→心脏→全身）。
- 区分动脉（将血液从心脏输送出去）、静脉（将血液输送回心脏）和毛细血管（进行物质交换的微小血管）。
- 说出血液的组成成分：红细胞（携带氧气）、白细胞（抵抗感染）、血小板（帮助凝血）、血浆（液体）。
- Name the four heart chambers and describe the double-loop pathway (heart → lungs → heart → body)
- Distinguish arteries (carry blood away from heart), veins (carry blood back to heart), and capillaries (tiny vessels where exchange happens)
- Name the components of blood: red blood cells (carry oxygen), white blood cells (fight infection), platelets (help clotting), plasma (liquid)
评估问题 / Assessment
{{name}}能否描述血液流经心脏和全身的路径——解释血液先到肺部获得氧气，再被输送到全身其他部位？
Can {{name}} trace the path blood takes through the heart and body — explaining that it goes to the lungs first for oxygen, then out to the rest of the body?