The elements gathered together become in certain parts firmly united. Know that those parts are called the vitals of the body. It is said so in the Shastras.
तथा यद्यद् भवेद् युक्तं संनिपाते क्वचित् क्वचित्। तत्तन्मर्म विजानीहि शास्त्रदृष्टं हि तत् तथा॥