Adeptus Astartes can live for extremely long, with some of the oldest Astartes living up to 1,500 years, such as Blood Angels chapter master, Commander Dante. Astartes that were injured gravely are interred into Dreadnoughts, with them living indefinitely such as Bjorn the Fell Handed, a Dreadnought who has lived 10,000 years.

Due to the genetic modifications Adeptus Astartes undergo they have larger mass and body, on average an Astartes towers over an average human at 8 to 10 feet tall. 

Your size is Large.

Adeptus Astartes are known for their immensely strong Power Armor. 

You gain [Tooltip Not Found] with Powered Armor.

Your Enhanced Biology of denser muscle and bone and sinews reinforced with durametallic coil-cables that contract with incredible force, dramatically magnifying the subject's strength beyond that of a regular Space Marine and giving another layer of interior defense, which greatly increases their durability., combined with training grants you enhanced strength, constitution and wisdom. You gain a +2 to strength and constitution and a +1 to wisdom. 

This simplest and most self-sufficient of implants allows a Space Marine to survive his other heart being damaged or destroyed, and to survive in low oxygen environments. Not just a back-up, the secondary heart can boost the blood flow around the Marine's body. 

Once per in game week if you go down during combat or other methods you automatically stabilise and regain one HP.

Known as the Revitalizer, this dormant organ connects to both hearts. In times of extreme stress or trauma, it expels self-manufactured chemicals similar to combat stimms that also aid in regeneration. After activating it must recharge over 24 hours. 

Upon being resuscitated by the second heart implant or other methods you gain a burst of adrenaline and other chemicals. You gain 5 hp at the start of your next turn and receive resistance to slashing, bludgeoning and piercing damage for the next round of combat.

Implanted into the back of the brain, this pea-sized organ influences the circadian rhythms of sleep and the body's response to sleep deprivation. If deprived of sleep, the catalepsean node cuts in. The node allows a Marine to sleep and remain awake at the same time by switching off areas of his brain sequentially. This process cannot replace sleep entirely, but increases the Marine's survivability by allowing perception of the environment while resting. This means that a Space Marine needs no more than 4 hours of sleep a day, and can potentially go for 2 weeks without any sleep at all.

This is essentially a pre-stomach that can neutralise otherwise poisonous or indigestible foods. No actual digestion takes place in the preomnor, as it acts as a decontamination chamber placed before the natural stomach in the body's system and can be isolated from the rest of the digestive tract in order to contain particularly troublesome intake.

This implant, also called "the Remembrancer", allows a Space Marine to 'learn by eating'. It is situated in the spinal cord but is actually part of the brain. Four nerve bundles are implanted connecting the spine and the stomach wall. Able to 'read' or absorb genetic material consumed by the marine, the omophagea transmits the gained information to the Marine's brain as a set of memories or experiences. It is the presence of this organ which has led to the various flesh-eating and blood-drinking rituals for which the Astartes are famous, as well as giving names to chapters such as the Blood Drinkers and Flesh Tearers. Over time, mutations in this implant have given some chapters unnatural cravings for blood or flesh.

This additional lung activates when a Space Marine needs to breathe in low-oxygen or poisoned atmospheres. The natural lungs are closed off by a sphincter muscle associated with the multi-lung and the implanted organ takes over breathing operations. It has highly efficient toxin dispersal systems. The multi-lung even allows space marines to breathe water.

This implant sits at the base of the brain, and provides hormonal and genetic stimuli which enable a Marine's eyes to respond to optic-therapy. This in turn allows the Apothecaries to make adjustments to the growth patterns of the eye and the light-receptive retinal cells - the result being that Space Marines have far superior vision to normal humans, and can see in low-light conditions almost as well as in daylight. The enhanced eyesight also allows Space Marines to clearly see targets at a distance of a couple of kilometres, making out enemy details with ease.

Not only does this implant make a Space Marine immune to dizziness or motion sickness, it also allows Space Marines to consciously filter out and enhance certain sounds. The Lyman's Ear completely replaces a Marine's original ears. It is externally indistinguishable from a normal human ear.

Initially implanted above the brain, this membrane eventually merges with the recipient's entire brain. Ineffective without follow-up chemical therapy and training, with sufficient training a Space Marine can use this implant to enter a state of suspended animation, consciously or as an automatic reaction to extreme trauma, keeping the Marine alive for years, even if he has suffered otherwise mortal wounds. Only the appropriate chemical therapy or auto-suggestion can revive a Marine from this state. The longest recorded period spent in suspended animation was undertaken by Brother Silas Err of the Dark Angels, who was revived after 567 years (d.321.M37)

In conjunction with the secondary heart this implant allows a Space Marine to filter his blood very quickly, rendering him immune to most poisons. The organ's everyday function is to monitor the entire circulatory system and allow other organs to function effectively.

This enhances a Space Marine's sense of taste to such a high degree that he can identify many common chemicals by taste alone. A Marine can even track a target like a hound by taste or just sampling air. This also has the effect of enhancing the flavour of consumables such as wine.

Consists of two identical glands, implanted either into the lower lip, alongside the salivary glands, or into the hard palate. The gland works in a similar way to the poison gland of venomous reptiles by synthesizing and storing deadly poison, which the Marines themselves are immune to. This allows a Space Marine to spit a blinding contact poison. The poison is also corrosive and can even burn away "strong" metals, given sufficient time.

There are two of these glands, one situated in the neck and the other within the chest cavity. These glands are vitally important and represent the future of the Chapter, as the only way new gene-seed can be produced is by reproducing it within the bodies of the Marines themselves. This is the implant's only purpose. The glands absorb genetic material from the other implanted organs. When they have matured, each gland will have developed a single gene-seed corresponding to each of the zygotes which have been implanted into the Marine.

These take time (5 years in the first case, 10 in the latter) to mature into gene-seed. The gene-seed can then be extracted and used to create more Space Marines. Thanks to the superior implantation process and genetic stability of Primaris Space Marines, the Imperium has recently been able to harvest gene-seed at a rate previously unseen.

The most distinctive implant, it resembles a film of black plastic that is implanted directly beneath the skin of the Marine's torso in sheets. It hardens on the outside and sends invasive neural bundles into the Marine's body. After the organ has matured the recipient is then fitted with neural sensors and interface points cut into the carapace's surface.

This allows a Space Marine to interface directly with his Power Armour. Without the Black Carapace many of the systems of the power armour will not function. While driving the vehicles of the Chapter, a special spinal interface plugged into the power armour and Black Carapace provides the Space Marine an intuitive 'feel' for vehicles systems and controls, literally making him a part of his vehicle.