Machina Biology
Despite how extremely advanced the sciences at play in a Machina's body are, they do not possess many separate organ systems. In basic terms, a Machina's body consists of her Core in the center of her chest to provide power from matter reactions, her brain and her horns for thinking and networking, her various power conduits such as her spine, her breasts to create M2 Nanomachines, and her sex organs. These are the universal systems found in all Machina; both anatomically simple yet so scientifically advanced it is almost fantastical.
Machinium
Whilst humans are based on carbon and other elements, Machina are made of Machinium. Machinium is a group of ultra-dense polymer superalloys which vary in their chemical compositions. The reason for this variation is because Machinium always has M2 Nanomachines embedded in it which alter the chemical composition of a given amount of Machinium in order to adapt to new needs, particularly stresses. As an example, if a Machina is hit with a heat-based weapon, the M2 Nanomachines in her body will learn as they repair her, and alter her casing's chemical composition to become more heat-resistant. Embedded M2 Nanomachines also carry out repairs and growth, so Machinium appears to be a living metal and is often referred to as 'biometal'.
A Machina's body is almost entirely comprised of Machinium. A Machina's face and other soft parts of her 'skin' casing are a softer form of Machinium that feels like plush rubber, yet hardens in response to impacts. Elsewhere on the Machina's body there may be semi-hard armour that is again a variant of Machinium which can flex somewhat but has a higher ability to harden in response to impacts. Actual armour plate is Machinium too, much more capable of withstanding damage yet its ability to feel things is much more dull than elsewhere. Internally, a Machina's bones are made of hardened Machinium, while her soft tissues and cell-structures are made of softer Machinium. This means a Machina's body is extremely dense and possesses a very large mass for their size, which is handled by the Anti-Inertia Systems outlined below.
In order for Machinium to adapt to new stresses, grow, and heal, it must be supplied by a circulation system. Blood flows through all M2-Based Life-Forms for this reason. The blood is comprised of a fluid medium, raw materials, and free M2 Nanomachines. The circulating M2 Nanomachines supply power from their bodies to the embedded M2 Nanomachines, as well as carrying materials with them to where they are needed. Without power supply to the embedded M2 Nanomachines, Machinium will break down over time, becoming inert liquid metal alloy and deactivated M2 Nanomachines. For this reason, a sample of a Machina must be studied quickly before it begins disintegrating into simple monomers.
Core
Yes
Power Systems
Yes
Anti-Inertia System
Yes
Brain
Yes
Horns
Yes
Breasts
Yes
Sex Organs
Yes
Fluids
Yes
Equipment
Yes
Interactions with Larvae
Yes