Skynet began production of the T-800 Series in 2026. The T-800 Series is a cybernetic organism. It consists of living tissue over a metal endoskeleton. The metal endoskeleton is a microprocessor controlled fully armoured hyper-alloy combat chassis. This endoskeleton is constructed with frictionless bearings in its joints, and a servo-actuated control system. Its limbs are controlled by axial drive motors and clavicular trailing links. This allows the T-800 to manoeuvre faster than the T-600, as bursts of speed of up to 22 mph no longer threaten the joint assemblies. The living tissue, grown specially for the T-800’s, consists of flesh, skin, hair and blood, and is capable of limited regeneration over time. As this tissue is living it is warm to the touch and hence T-800's will not show up on thermal scanners as being any different from a real human. The biological components are only grafted onto T-800's which are to be used to infiltrate our bases; T-800's which are deployed straight onto the battlefield usually do not possess biological components. In order to keep track of its battle units, Cyberdyne Systems had given each one a Series number. The Series number refers to the type of internal structure or chassis. However, the T-800 Series also has different configurations of living tissue, each giving it the appearance of a different person. The physical appearance of the living tissue (which was initially based on photographic records from Skynet's databases) is therefore also given a Model number. As part of our scientific progression, mankind has unravelled the human genome and we were able to identify the genes which control cell life-span and degradation. Using this information, stored within its vast databases, Skynet has been able to eliminate these unwanted genes from cells prior to industrially growing biological components for the T-800's.
This means that the skin and muscles of the T-800's, unlike the human equivalents, do not wear down, degrade or necrotize over relatively short periods of time. It also means that the T-800's biological components will not rot over long periods of time, and do not require a flow of nutrients or anti-bodies. However, if a T-800 is left on the battlefield for too great a period, it's biological components will begin to rot, and its cover will be blown.
Though it does not need nutrient or blood flow, the T-800 has a circulatory system which is controlled by a tiny pneumatic pump which maintains a constant pressure. This allows the T-800 to bleed convincingly when wounded. However, the living tissue of the T-800's is still prone to necrotizing after a period. Therefore, when not in active service, flesh covered T-800's are stored in special racks in a cryogenic vault to preserve the flesh from deteriorating. The unactivated T-800's are housed within a large vault-like cold-storage room. Massive doors of steel, equipped with electronic locking bolts bar the entrance to this facility. The T-800's hang in steel racks from tracks mounted in the ceiling. Hundreds of flesh covered T-800's are stored like this. They are arranged in rows of ten, where each of the bodies within each row are absolutely identical. Each body hangs in its own cryogenic hybermatrix. This cryogenic storage and the vacuum sealed room ensures that the T-800's flesh will not decay or necrotize from exposure to warm, oxygenated air that may contain pathogens.