वस्ति

स्त्री० [सं०] १. नाभि के नीचे का भाग। पेडू। २. मूत्राशय। (यूरिनरी ब्लैडर)। ३. पिचकारी। ४. दे० ‘वस्ति कर्म’

At the time of semen ejaculation, sperms are travels from two tube called as vas difference and which are situated behind the urinary bladder..

Syringes are used for injecting medicines in the body of a sick person.