鞘肌；肌层

The cardiac muscle, also known as muscularis myocardium, contracts to pump blood throughout the body.
心脏肌肉，也称为心肌，负责泵血全身。
The smooth muscularis is responsible for involuntary movements like peristalsis in the digestive tract.
平滑肌是负责消化道内诸如蠕动等自主运动的肌肉类型。
The skeletal muscle, found in bones and attached to joints, powers our voluntary actions.
骨骼肌存在于骨骼中，附着于关节，驱动我们的随意动作。
The muscularis externa is the layer of muscle that covers the skin, providing support and protecting against external pressure.
外膜肌是覆盖皮肤的肌肉层，提供支撑并保护免受外部压力。
In the urinary bladder, the muscularis urogenitalis helps control urine flow.
在膀胱中，生殖器肌帮助控制尿液的排出。
The circular muscle of the stomach, muscularis circularis, contracts rhythmically to churn food.
胃的环状肌，即胃肌，有规律地收缩以研磨食物。
The diaphragm, a primary muscularis, separates the chest from the abdomen and aids in breathing.
横膈膜，一种主要的肌肉，将胸腔与腹腔分隔开，参与呼吸。
The myofibrils, the individual muscle fibers within muscularis, contract and relax to produce movement.
肌纤维，肌内肌纤维，收缩和放松产生运动。
The muscularis propria, found in internal organs, provides strength and support without being visible.
在内脏中的固有肌，提供力量和支撑，但不直接可见。
The muscularis intima, the innermost layer of muscle in blood vessels, helps regulate blood flow.
内皮肌，血管内层的最内层肌肉，有助于调节血液流动。