The Compendium of Bheḷa 4.4.27

4.4.27

athadaśāntarguhāḥ[-antahānta], daśa bahirguṇāḥ? | tad yathā---dvicakṣuṣī dvināsike dveśravasī kaṇṭhanāḍīgudameḍhravāyusrotāṃsīti[srotasī kaṇṭhanābhi-] daśa antarguhāḥ | daśa dhamanyohṛdaye[hṛdayaṃ] nibaddhā bhavanti | tāḥprabhave[prabhavaṃ] caturaṃgulamātraṃ gatvā viṃśatirbhavanti |evam etā daśa dhamanyaḥ ṣaṣṭirbhavanti | tatra tubhavanti[bhavantutrī] trīṇi śatasahasrāṇi ṣaṣṭiriyaṃ[ṣahtaṃśāli] jālāni sirāṇāṃ | tad yathā---vṛkṣaḥ[vṛkṣa]śākhāvṛtaḥ[śākhāvṛta] phalapalāśairavatarati sarvatra | tad yathā vāhāgo[hanyo]+aśmabhir atataḥ[aśmabhir ataraḥ] tathāyaṃ[tatāyaṃ] sirābhir avatataḥ | romakūperomakūpe[rūpakūpe] hy asya sirāmukhaṃ bhavati, yataḥ svedaḥ[svetaḥ]kṣaratīti[kṣiratīti] ||

Now, what are the ten internal cavities and the ten external attributes? They are as follows: the two eyes, the two nostrils, the two ears, the throat-channel, anus, penis, and channels of wind—these are the ten internal cavities. Ten vessels are attached to the heart. At their origin, having gone the measure of four finger-breadths, they become twenty. Thus these ten vessels become sixty. In that regard, there are three hundred and sixty networks of channels. Just as a tree covered with branches extends everywhere with fruits and leaves, just as […] is covered with stones, so is this [body] pervaded with channels. For in every hair-follicle is an opening of a channel, from which sweat flows.