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| hp = 50
 
| hp = 50
 
| flammability = 1.0
 
| flammability = 1.0
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| marketvalue  = 1200
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| marketvalue  = 500
 
| thingCategories = BodyPartsNatural
 
| thingCategories = BodyPartsNatural
 
}}
 
}}
  
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The liver regulates most chemical levels in the blood and excretes a product called bile. This helps carry away waste products from the liver. All the blood leaving the stomach and intestines passes through the liver. Destruction of the liver is instantly fatal.
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The liver regulates most chemical levels in the blood and excretes a product called bile. This helps carry away waste products from the liver. All the blood leaving the stomach and intestines passes through the liver.  The liver accounts for up to 100% of a person's [[blood filtration]] along with the kidneys, and 50% of a person's [[metabolism]]. Destruction of the liver is instantly fatal.
  
 
==Acquisition==
 
==Acquisition==
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{{see also|Human resources#Organ harvesting{{!}}Human resources}}
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{{see also|Human resources}}
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Liver items are harvested from live [[human]]s through [[surgery]]. It must be perfectly healthy in order to obtain the item. This bill requires 1 of any type of medicine to perform. [[Doctoring#Success_chance|Success chance]] is dependent on a number of factors, including bed [[quality]], [[Room stats|room cleanliness]], and doctor skill - specifically the doctor's [[Medical Surgery Success Chance]]. Removing the liver will kill the pawn.
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While most [[animals]] have livers, the liver item can only be acquired by harvesting them from [[human]] [[pawns]] through the [[surgery]] bill. This bill requires 1 of any type of medicine to perform. [[Doctoring#Success_chance|Success chance]] is dependent on a number of factors, including bed [[quality]], [[Room stats|room cleanliness]], and doctor skill - specifically the doctor's [[Medical Surgery Success Chance]].  
  
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Removing the liver from a guest or prisoner will decrease faction [[goodwill]] by 160 points, to a cap of -100; -80 for the surgery, and -80 for murder. Other colony members can get potentially tremendous [[mood]] penalties, which all stack:
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Removing a liver from a guest or prisoner decreases [[faction]] goodwill by:
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: {{--|5}} for "Someone's organ harvested" (any organ); {{--|6}} if colonist
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: -20 points for organ harvesting
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: {{--|6}} for "Someone organ-murdered"
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: - 6 points for murder
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: {{--|5}} for "Witnessed ally's death" (on colonist)
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This is down to a max of -100, and creates a -5 [[mood]] to your pawns for 8 days due to "someone's organ harvested", stacking up to 5 times, with a 0.75x multiplier.  
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: {{--|4}} for "Observed corpse"
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Pawns with the [[Bloodlust]] or [[Psychopath]] traits, or those with an [[Ideoligion]] with [[Ideoligion#Organ use|Organ Use: Acceptable]]{{IdeologyIcon}} are not affected by the harvesting of other people. Other Ideologion precepts may change moodlets for harvest and organ use.
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Because removing the liver is invariably fatal, removing it from your own colonist can give potentially tremendous [[mood]] penalties:
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: -5 for "Colonist organ harvested" (any organ)
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: -6 for "Colonist organ-harvested" (fatal organ harvesting, stacks with the first, as well as penalties for anybody who participated in or was friends with the colonist)
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: -4 for "Observed corpse"
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: -5 for "Witnessed ally's death"
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: -3 for "My friend died" (does not have to "witness" the event)
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:: = -23
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If you intend to harvest a liver from one of your own colonists, be very careful about managing mood afterwards, especially for the doctor who carries it out.
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Pawns with the Bloodlust and Psychopath [[trait]] are not affected by the harvesting of other people.
  
 
Livers can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.
 
Livers can also be acquired through [[trading]] with faction settlements or Exotic Goods traders.
  
 
== Summary ==
 
== Summary ==
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Livers are a vital part for humans; losing one will instantly kill them. Livers account for 100% of [[Blood Filtration]] and 50% of [[Metabolism]].
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{{stub|section=1}}
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Summary stuff goes here
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Blood Filtration has a 0.1x effect on [[Consciousness]], so losing 90% of the liver means -9% Consciousness, which affects a wide variety of stats. It also has a 0.5x effect on [[Immunity Gain Speed]], so a damaged liver will make [[disease]]s much more deadly. Finally, damage to Metabolism reduces the [[Rest Rate Multiplier]], which makes a pawn sleep for longer periods to become fully rested.
 
  
 
===Installation===
 
===Installation===
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{{stub|section=1}}
 
Installing the part requires {{ticks|2500}} of work, ?x medicine of ?? quality or better, and a [[Skills#Medical|Medical skill]] of 5.
 
Installing the part requires {{ticks|2500}} of work, ?x medicine of ?? quality or better, and a [[Skills#Medical|Medical skill]] of 5.
  
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Removing the part requires {{ticks|2000}} of work, 1x medicine of [[Herbal medicine|herbal]] quality or better, and has no [[Skills#Medical|Medical skill]] requirements.
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Removing the part requires ? of work, ?x medicine of ?? quality or better, and a [[Skills#Medical|Medical skill]] of ?.
  
 
If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.
 
If the operation fails, the part has a chance{{Check Tag|What Chance?}} to be destroyed.
  
 
==Analysis==
 
==Analysis==
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Harvesting from a guest will inflict massive [[goodwill]] penalties, and harvesting from a colonist will bring even more [[mood]] penalties, so simply steal organs from a prisoner. If you want a colonist dead, it's best to imprison them first.
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While livers can be harvested from prisoners, guests, and your own colonists, generally it is preferable to harvest from prisoners because removing the liver is fatal. Killing a guest or your own colonist carries a significant mood penalty.
  
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Total destruction of the liver is instantly fatal, while Consciousness and Immunity Gain Speed are important stats. Thus, you should replace damaged livers on valuable colonists as soon as possible. It must be noted that the Liver is the only organ that has no current bionic replacement.  
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There are two primary reasons to harvest an organ - trade and transplantation.
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===Transplantation===
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Livers can be damaged by disease, drugs, or combat. Damage to the Liver reduces Blood Filtration (up to 100% when totally destroyed) and Metabolism (up to 50% when totally destroyed). This has several effects - the first is up to a 10% reduction in [[Consciousness]] which in turn affects almost every task a pawn can perform - making them slightly worse in basically every way.
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The second, perhaps more urgent, effect is up to a 50% reduction in [[Immunity Gain Speed]] based on damage to Blood Filtration. This significantly reduces the survivability of infections and common diseases such as the [[Flu]]. If a pawn has an immunity gain speed of 58% or lower because of damage to the liver or kidneys, then the flu will be invariably fatal.
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Finally, damage to the Metabolism capacity reduces the [[Rest Rate Multiplier]] which makes a pawn sleep for longer periods to become fully rested.
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Total destruction of the liver is instantly fatal. Thus, it is recommended to replace damaged livers on valuable colonists as soon as possible.
  
 
===Trade===
 
===Trade===
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Livers are worth {{icon Small|silver||{{Q|Liver|Market Value Base}}}}, worth exactly the same as a [[heart]]. However, the heart can be replaced by the cheaper [[prosthetic heart]]; by installing the prosthetic, you can obtain both the heart and the liver.
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Each liver is worth 500 silver, and only has a mass of 2. The abundant supply of [[raiders]] means that, if the mood penalty can be withstood, a significant amount of value can be extracted from them without having to keep prisoners and wait for a Slave Trader or Royal Tribute Collector {{RoyaltyIcon}}.
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Because removing the Liver is fatal, it's actually suboptimal to remove when the other organs are all okay.  The [[Heart]], [[Lung]]s, and [[Kidney]]s are also options for harvesting. If willing to organ-murder the donor, the optimum is removing:
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* 1x Lung worth {{icon|silver|{{Q|Lung|Market Value Base}}}}
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* 1x Kidney worth {{icon|silver|{{Q|Kidney|Market Value Base}}}}
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* 1x Heart worth {{icon|silver|{{Q|Heart|Market Value Base}}}}
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For a total of {{icon|silver|{{#expr:{{Q|Heart|Market Value Base}} + {{Q|Kidney|Market Value Base}} + {{Q|Lung|Market Value Base}}}}}}.
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If the Heart is unavailable you can take the Liver instead which has the same value but weighs twice as much. If that is also unavailable, the second lung and then the second kidney are the optimal options.
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Removing the heart, liver, second lung or second kidney are all fatal and prevent further harvesting.  
  
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A completely removed heart/liver will kill a pawn. Therefore, it's best to harvest a [[kidney]] and a [[lung]] before taking the liver. This is worth {{icon Small|silver||{{Q|Lung|Market Value Base}}}} + {{icon Small|silver||{{Q|Kidney|Market Value Base}}}} + {{icon Small|silver||{{Q|Liver|Market Value Base}}}} = {{icon Small|silver||{{#expr: {{Q|Lung|Market Value Base #}} + {{Q|Kidney|Market Value Base #}} + {{Q|Liver|Market Value Base #}}}}}}, before accounting for [[Trade Price Improvement|Market Price]] or the prosthetic heart. This comes at the usual mood penalties, unless you have a colony filled with [[Psychopath]]s or a favorable [[Ideoligion]]{{IdeologyIcon}}. A Royal Tribute Collector{{RoyaltyIcon}} will ignore lost organs for sold prisoners, as long as they can walk.
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If unwilling to organ murder the donor, the best option is to harvest
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* 1x Lung worth {{icon|silver|{{Q|Lung|Market Value Base}}}}
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* 1x Kidney worth {{icon|silver|{{Q|Kidney|Market Value Base}}}}
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For a total of {{icon|silver|{{#expr:{{Q|Kidney|Market Value Base}} + {{Q|Lung|Market Value Base}}}}}}.
  
 
== Version history ==
 
== Version history ==
 
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
 
* [[Version/0.7.581|0.7.581]] - Item form added, and now harvestable.
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* ? (Possibly 1.4) - Market value increased from {{Icon small|silver||500}} [[silver]] to {{Icon small|silver||1200}} [[silver]].
 
  
 
{{nav|body parts|wide}}
 
{{nav|body parts|wide}}
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[[Category:Medical Item]] [[Category:Body Part]] [[Category:Organ]]
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[[Category: Medical Item]]
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[[Category: Body Part]]

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