n.肌原纤维节

Each sarcomere is composed of two actin filaments and one thick filament.
每个肌节由两根细肌丝和一根粗肌丝组成。
The sarcomere is the functional unit of muscle contraction in animals.
肌节是动物肌肉收缩的基本功能单位。
The length of a sarcomere determines the extent of muscle shortening during contraction.
肌节的长度决定了肌肉收缩时的缩短程度。
The sliding filament theory explains how sarcomeres generate force during muscle movement.
滑动细肌丝理论解释了肌节在肌肉运动中如何产生力量。
In skeletal muscle, sarcomeres are aligned side by side to form myofibrils.
在骨骼肌中，肌节并排排列形成肌原纤维。
Sarcomeres are organized into repeating units called myosin heads.
肌节被组织成称为肌球蛋白头的重复单元。
The overlap between adjacent sarcomeres allows for a continuous contraction without gaps.
相邻肌节之间的重叠使得肌肉可以连续收缩而无间断。
During relaxation, actin and myosin filaments slide past each other within the sarcomere.
在松弛过程中，细肌丝和粗肌丝在肌节内相互滑过。
The number of sarcomeres in a muscle fiber determines its contractile strength.
肌肉纤维中的肌节数量决定了其收缩力。
The structure of sarcomeres is crucial for understanding muscle physiology and disease.
肌节的结构对于理解肌肉生理学和疾病至关重要。