§4.4.14 τὸ δὲ καλούμενον μεσεντέριον ἔστι μὲν ὑμήν, διατείνει δὲ συνεχὲς ἀπὸ τῆς τῶν ἐντέρων παρατάσεως εἰς τὴν φλέβα τὴν μεγάλην καὶ τὴν ἀορτήν, πλῆρες ὄν φλεβῶν πολλῶν καὶ πυκνῶν, αἳ τείνουσιν ἀπὸ τῶν ἐντέρων εἰς τε τὴν μεγάλην φλέβα καὶ τὴν ἀορτήν.
4 On the other hand, what is called the mesentery is a membrane, extending continuously from the stretch of the intestines to the great vein and the aorta, being full of many and dense veins which extend from the intestines to both the great vein and the aorta.
§4.4.22 τὴν μὲν οὖν γένεσιν ἐξ ἀνάγκης οὖσαν εὑρήσομεν ὁμοίως τοῖς ἄλλοις μορίοις· διὰ τίνα δʼ αἰτίαν ὑπάρχει τοῖς ἐναίμοις, φανερὸν ἐστιν ἐπισκοποῦσιν.
2 Now, that its generation is of necessity we shall find in a similar way as with the other parts; but for what cause it exists in red-blooded animals is clear to those who investigate.
ἐπεὶ γὰρ ἀναγκαῖον τὰ ζῷα τροφὴν λαμβάνειν θύραθεν, καὶ πάλιν ἐκ ταύτης γίνεσθαι τὴν ἐσχάτην τροφὴν, ἐξ ἧς ἤδη διαδίδοται εἰς τὰ μόρια (τοῦτο δὲ τοῖς μὲν ἀναίμοις ἀνώνυμον, τοῖς δʼ ἐναίμοις αἷμα καλεῖται), δεῖ τι εἶναι διʼ οὗ εἰς τὰς φλέβας ἐκ τῆς κοιλίας οἷον διὰ ῥιζῶν πορεύσεται ἡ τροφή.
For since it is necessary for animals to take nourishment from without, and again from this must arise the ultimate nourishment from which it is already distributed to the parts (this is nameless in bloodless animals, but in red-blooded ones is called blood), there must be something through which the nourishment will proceed from the stomach into the veins as if through roots.
§4.4.33 τὰ μὲν οὖν φυτὰ τὰς ῥίζας ἔχει εἰς τὴν γῆν (ἐκεῖθεν γὰρ λαμβάνει τὴν τροφήν), τοῖς δὲ ζῴοις ἡ κοιλία καὶ ἡ τῶν ἐντέρων δύναμις γῆ ἐστίν, ἐξ ἧς δεῖ λαμβάνειν τὴν τροφήν· διόπερ ἡ τοῦ μεσεντερίου φύσις ἐστίν, οἷον ῥίζας ἔχουσα τὰς διʼ αὐτῆς φλέβας.
3 Now, plants have their roots in the earth (for from there they receive their nourishment), but for animals, the stomach and the power of the intestines are the earth, from which they must receive their nourishment; wherefore the nature of the mesentery is such as to have the veins running through it like roots.
§4.4.44 οὐ μὲν οὖν ἓνεκα τὸ μεσέντεριόν ἐστιν, εἴρηται· τίνα δὲ τρόπον λαμβάνει τὴν τροφήν, καὶ πῶς εἰσέρχεται διὰ τῶν φλεβῶν ἀπὸ τῆς εἰσιούσης τροφῆς εἰς τὰ μόρια ταῦτα τὸ διαδιδόμενον εἰς τὰς φλέβας, ἐν τοῖς περὶ τὴν γένεσιν τῶν ζῷων λεχθήσεται καὶ τὴν τροφὴν.
4 Therefore, the purpose for which the mesentery exists has been stated; but in what manner it receives nourishment, and how that which is distributed into the veins enters from the incoming nourishment through the veins into these parts, will be stated in the treatise on the generation and nourishment of animals.
§4.4.55 Τα μὲν οὖν ἔναιμα τῶν ζῴων πῶς ἔχει μέχρι τῶν διωρισμένων μορίων, καὶ διὰ τίνας αἰτίας, εἴρηται·
5 Now, how the red-blooded animals are constituted up to the defined parts, and for what causes, has been stated.
περὶ δὲ τῶν εἰς τὴν γένεσιν συντελούντων, οἷς δοκεῖ διαφέρειν τὸ θῆλυ τοῦ ἄρρενος, ἐχόμενον μέν ἐστι καὶ λοιπὸν τῶν εἰρημένων· ἀλλʼ ἐπειδὴ περὶ γενέσεως λεκτέον, ἁρμόττον ἐστὶ καὶ περὶ τούτων ἐν τῇ περὶ ἐκείνων θεωρία διελθεῖν.
But as for those parts which contribute to generation, by which the female is thought to differ from the male, they are indeed continuous with and remain from what has been said; but since we must speak of generation, it is appropriate to discuss these also in the inquiry concerning those matters.