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{{SpaceMarinesPortal}}

[[File:SManatomy.jpg|thumb|right|300px|Anatomy of a Space Marine{{Fn|5}}]]

==Recruits==

===Requirements===

{{clear}}

===Canis Helix===

===Secondary Heart===

'''Phase 2:''' A small, complex, tubular organ, the ossmodula secretes hormones that both affect the ossification of the skeleton and encourages the forming bone growths to absorb ceramic-based chemicals that are laced into the Marine's diet. This drastically alters the way a Space Marine's bones grow and develop. Two years after this implant is first put in the subject's long bones will have increased in size and strength (along with most other bones), and the rib cage will have been fused into a solid, bulletproof mass of interlocking plates.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|11}}{{Fn|Note 1}}

*Known mutations:

===Biscopea===

'''Phase 3:''' This small, circular organ is inserted into the chest cavity and releases hormones that vastly increase muscle growth throughout the marine's body. It also serves to form the hormonal basis for many of the later implants.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|11}}

*Known mutations:

===Primaris Implants===

'''Phase 7:''' 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.{{Fn|1}}{{Fn|2a}}{{Fn|3}}

*Known mutations:

===Omophagea===

'''Phase 8:''' 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.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|6}}

*Known mutations:

===Multi-lung===

'''Phase 10:''' 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.{{Fn|1}}{{Fn|2a}}{{Fn|3}} 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.{{Fn|17}}

*Known mutations:

===Lyman's Ear===

'''Phase 11:''' 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 inner ears. It is externally indistinguishable from a normal human ear.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|11}} This might allow a Space Marine to distinguish a human heartbeat from a kilometre away.{{Fn|22}}{{Fn|Note 2}}

*Known mutations:

===Sus-an Membrane===

*Known mutations:

===Melanchromic Organ===

'''Phase 13:''' Also called the '''Melanochrome''',{{Fn|25}} this implant controls the amount of melanin in a Marine's melanin-possessing organs (skin, hair, and eyes). Exposure to high levels of sunlight will result in the Marine's skin darkening to compensate. It also protects the Marine from other forms of radiation.{{Fn|1}}{{Fn|2a}}{{Fn|3}} Blood composition is also adjusted alongside skin pigmentation according to radiation monitored by the implant.{{Fn|25}}

*Known mutations:

***[[Carcharodons]] do this as well, and in addition, their skin will develop denticles.{{Fn|24}}

===Oolitic Kidney===

'''Phase 15:''' This enhances a Space Marine's sense of taste to such a high degree that he can identify many common harmful chemicals by taste. The organ is implanted into the back of the mouth.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|18}}{{Fn|25}} Its abilities also extends to tasting the air.{{Fn|18}}{{Fn|Note 3}} A Marine can even track a target like a hound by tasting or chewing on something,{{Fn|1}}{{Fn|2a}}{{Fn|3}} or even by just sampling air.{{Fn|18}} This also has the effect of enhancing the flavour of consumables, such as wine.{{Fn|18}}

*Known mutations:

===Mucranoid===

'''Phase 16:''' This implant allows a Space Marine to sweat an oily, naturally cleansing substance that coats the skin and offers resistance to extreme heat and cold.{{Fn|1}}{{Fn|2a}}{{Fn|3}}{{Fn|25}} This oil from the modified sweat glands can even provide some protection for the marine in a vacuum. This can only be activated by outside chemo-therapy treatment, and is standard procedure when Space Marines are expected to be fighting in the vacuum of space. The Mucranoid organ is implanted at the base of the lower intestine where its hormonal secretions are absorbed through the colon.{{Fn|1}}{{Fn|2a}}{{Fn|3}}

*Known mutations:

===Betcher's Gland===

'''Phase 17:''' 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.{{Fn|1}}{{Fn|2a}}{{Fn|3}}

*Known mutations:

===Progenoids===

*Known mutations:

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*{{Endn|24}}: [[Carcharodons: Red Tithe (Novel)]], Chapter I

*{{Endn|25}}: [[The Horus Heresy Book One - Betrayal]], pg. 28

[[Category:Space Marines]]