It has a very well-developed muscular tissue and its function is to contract and relax, contract and relax.

该肌肉组织非常发达,用来使心脏收缩,放松,收缩,放松

耶鲁公开课 - 生物医学工程探索课程节选

One of the first steps in that healing is that fibroblasts like this cell crawl into the space that's created by the wound and they grab a hold of both sides of the wound and contract and try to pull it together.

愈合的第一步是,成纤维细胞向,损伤的创口爬行,紧紧地抓住创口的两侧,通过收缩回拉 试着使创口合拢

耶鲁公开课 - 生物医学工程探索课程节选