The heart is a vital part of the circulatory system.

心脏是循环系统的重要组成部分。

Smoking can have a negative impact on your circulatory system.

吸烟会对你的循环系统产生负面影响。

The circulatory system transports oxygen and nutrients throughout the body.

循环系统将氧气和营养物质输送到全身。

The capillary is part of the circulatory system.

毛细血管是血液循环系统的一部分。

The doctor explained how the artery functions in the circulatory system.

医生解释了动脉在循环系统中的功能。

The doctor explained how a venule functions in the circulatory system.

医生解释了小静脉在循环系统中的功能。

The doctor explained how a veinlet functions in the circulatory system.

医生解释了小静脉在循环系统中的功能。

The capillaries connect the arteries and veins in the circulatory system.

毛细血管连接循环系统中的动脉和静脉。

The pulmonary vein is an important part of the heart's circulatory system.

肺静脉是心脏循环系统的重要组成部分。

A healthy diet is essential for maintaining a good circulatory system.

健康的饮食对于维持良好的循环系统至关重要。