| 功能 |
The central pump of the cardiovascular system, propelling blood through the pulmonary and systemic circuits. Beats approximately 100,000 times per day, pumping about 7,500 liters of blood daily. |
The largest and longest nerve in the body, providing motor innervation to the posterior thigh and all muscles below the knee. Provides sensory innervation to the lateral leg, foot, and … |
| 临床意义 |
Coronary artery disease is the leading cause of death worldwide. Myocardial infarction results from coronary artery occlusion. Heart failure, valvular diseases, arrhythmias, and congenital heart defects are major cardiovascular conditions. |
Sciatica (sciatic nerve irritation, often from disc herniation) causes radiating pain down the posterior leg. Piriformis syndrome compresses the nerve in the buttock. Improper gluteal injections can damage the nerve. … |