For example, the lungs and the heartmuscle expand less successfully, the blood vessels become increasingly rigid, and the ligaments and tendons tighten.
例如，肺部和心脏肌肉扩张不太成功，血管变得越来越僵硬，韧带和肌腱收紧。
2
In the heart, action potential is moving from one heartmuscle cell to another over the surface of the heart.
在心脏中，动作电位是在心脏表面从一个心肌细胞向另一个心肌细胞传递。
3
In the trial, the CD34 + cells were injected into 10 locations in the heartmuscle.