During coronary angiography, a thin tube (catheter) is threaded through a blood vessel into the heart, where a special dye is injected.

在冠状动脉造影时，一个细管(导管)通过血管进入心脏，注入一种特殊的染料。

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First, the heart of an embryo starts off as a little tube, similar to the heart of a goldfish.

首先胎儿时期的心脏，就是一个小血管，和金鱼的心脏差不多大。

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Cleft palate , neural tube defects, excessive numbers of fingers or toes, congenital heart disease and water on the brain are the top five birth defects among Chinese babies, the report said.

报告中提到，唇腭裂、神经管缺损、多趾症、先天性心脏病和脑积水是困扰我国新生儿的五大出生缺陷。

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In a notable success, Asashima created a test-tube heart - and kept it beating for one month.

CNN: GROWN TO ORDER

The heart plug is implanted through a transcatheter tube inserted through the groin, a minimally invasive procedure compared with open-heart surgery.

WSJ: Doctors Debate Whether Strokes Be Prevented With a Heart-Plug Procedure

The precocious 6-year-old was born with a congenital heart defect and had a complication with a tube inserted in his right leg, leading to an amputation above his knee.

CNN: Double amputee loses legs, finds a cause