he thinketh is the Liuer, because the Infant liueth at first the life of a plant needing onely nutrition as doth a plant; now the Liuer is the shop or storehouse of Aliment. As there∣fore a plant hath no need of a heart, so neither the Infant in the beginning.
Moreouer that the Liuer is first generated may be proued by his magnitude and the fa∣cility of his generation, for it is made onely of congealed bloud; adde hereto that the vm∣bilicall veine atteyneth to the Liuer before it commeth to the Heart. That all these things are true Galen teacheth in the third Chapter of his Booke de formatione faetus, because in In∣fants the natural faculties as being the first of all other are the strongest, those that rise from the Heart much weaker, those weakest of all which come from the Brayne. Furthermore all Generation proceedeth from that which is more imperfect to that which is more per∣fect: wherefore first is the liuer generated, then the Heart and last of all the Brayne. This is the opinion of Galen and almost of all Physitians both old and new concerning the con∣formation of the parts.
We for our owne part doe not vse to sweare vnto the opinion of any man, but as wee esteeme much and haue in great reuerence the patrons and founders of our Art, as becom∣meth vs well; so if at any time they stray from the rule of right reason, wee shall not make scruple to dissent from them. VVhatsoeuer therefore Galen may think, we cannot be per∣swaded that the Liuer is first formed, because before the delineation of all the parts of the Infant hee needeth not the helpe of the Liuer; for it was not behoofefull that the blood should flow till after the discretion and discription of the spermaticall parts, otherwise the seede would be cloyed and clogged with blood and instead of a lawfull Conception a Mo∣la would be formed.
As for that nourishment and encrease which Galen feygneth should bee made by the blood, we are so farre from thinking it necessary to the first conformation, that we rather thinke with Hippocates and Aristotle that it would haue beene a great hinderance thereto, so that we may retort Galens weapon which he vseth against Aristotle vppon himselfe. The Infant sayth Galen needeth not the helpe of the heart, therefore the heart is not formed be∣fore the Liuer. VVe say, the Infant needed not the helpe of the Liuer because it is not nou∣rished till after the delineation of the spermaticall partes is absolued, wherefore the Liuer ought not to be formed before the Heart and the Brayne.
You will obiect for Galen that life is limited and defined by nutrition, if therefore the Embryo doe liue it needeth to bee nourished. I answer, that in creatures that are perfect nothing liueth that is not nourished, but imperfect creatures and such as are without bloud may liue a time without nourishment, so some creatures liue al winter in holes and a plant all winter is not nourished, but viuifieth and quickneth it selfe. The tender Embryo ther∣fore which is without blood liueth the first dayes and yet is not nourished, because there is no necessity of nourishment seeing there is no exhaustion of the parts.
It remayneth now that we make manifest vnto you our own conceit of the order of Con∣formation, which we will doe as briefly and perspicuously as possibly wee can: but because we would haue euen the most ignorant conceiue vs the better we wil vse first these distinc∣tions.
Of the partes some are proper to the Infant it selfe of which it hath vse in the whole course of his life; others are seruiceable vnto it onely so long as it abideth in the mothers wombe, of which kinde are those skinny couerings and small membranes compassing the Infant about. Againe we must obserue thus much, that some partes are spermaticall en∣gendered of the crassament of the seed, others fleshy whose originall is immediately from the bloud. And of these fleshy parts there are three kinds as there are three kinds of flesh. For it is either the flesh of the bowelles which wee call Parenchyma or the flesh of the mus∣cles, which Hippocrates properly and absolutely tearmeth 〈 in non-Latin alphabet 〉〈 in non-Latin alphabet 〉, that is Flesh, or the peculiar flesh of euery part which hath not any proper name.
These things being thus, we conceiue. That the membranes called Amnion and Chorion are first of all formed, because the inward and most noble part of the seede was to bee de∣fenced and walled about with these curtaynes, as we shall shew more distinctly in our next exercise.
These coates being formed, we thinke that the rudiments or stamina and threds of all the spermaticall parts are formed together at once, because the matter is the same, alike al∣tered and disposed by the heate, the workeman the same to wit the spirit diffused through the whole masse of the seed, the Finall cause the same, that is, the vse of euery singular part.