Heart is pumping blood and oxygen into body parts. One of its main role is actually to send oxygen contained in the circulatory system into each body parts reserve connected to it.
On each pulse, heart send oxygen to each connected body parts. Connected body parts are all parts linked to heart through a chain of circulatory layers present in adjacent body parts, including internal ones.
Heart uses the body part parent hierarchy to decide what is connected to it.
Indeed, on human, the torso is the root of the body part parent hierarchy.
Heart should check then what are the children of the torso to know which body parts are connected to it.
Lungs are the organs interfacing between the atmospherics and circulatory systems. They intake gases, including oxygen, and transfer a part of it into the circulatory system.
Lungs have a specific rate at which they do this intake. If the equilibrium between amount of oxygen needed by body parts and amount of oxygen available gets negative (e.g when too much blood is lost or when oxygen in air is low), then the intake rate may increase.
Lungs are working independently from each other, meaning a human can survive with only one lung left, even though it will be able to intake only half the amount of oxygen it needs, and so will have to breath two times faster.
The messy inner workings of man.
Humanoids with organs can also suffer damage to specific organs, separate but still connected to the other damage types. To analyze organ damage, you need a health analyzer equipped with an organ scan upgrade, which will assess damage in these relative terms:
1-9: "Minor"
10-29: "Moderate"
30-64: "Significant"
65-99: "Critical"
100 and above: "Dead"
Usually, "Significant" and "Critical" are the most important ratings, for some organs cause extra problems upon reaching the "Critical" damage threshold.
If left untreated, these problems can cause the organ to fail completely and die, resulting in the same effects as lacking one. Dead organs cannot be healed back to full health and thus require transplants.
Below is a breakdown of players’ organs, and what they do.
Brain
Controls all motor functions – speech, movement, and consciousness.
Reduces functions. Kills the player if the brain is dead.
Eyes
Allows the player to see.
Various degrees of visual impairments. Blurriness, blindness, etc.
Ears
Allows the player to hear.
Tinnitus, deafness.
Tongue
Allows the player to speak and taste.
Mute and loss of taste.
Lungs
Heals oxygen damage, as long as it's intaking enough O2.
Lung failure or removal deals oxygen damage over time.
Stomach
Allows players to eat.
Failure or death prevents the player from eating.
Intestines
Allows players to digest foods and absorb reagents.
Failure removes the player’s ability to absorb sustenance from food or reagents.
Liver
Depletes chemicals in the body, occasionally soaks up 1/12 of sustained toxin damage.
Liver failure or death causes fainting, halves the rate of chemical depletion, and deals toxin damage over time.
Kidneys
Having kidneys prevents not having kidneys.
Kidney failure or death deals toxin damage over time. Both kidneys dead or missing reduces chemical depletion by 50%.
Appendix
Small chance of causing appendicitis.
Failure may cause the appendix to explode, causing disease or major toxin damage.
Spleen
Regenerates blood.
Failure or death prevents the body from regenerating blood.
Pancreas
Depletes sugar in the body by producing insulin.
Failure or death stops pancreas from producing insulin. (Sugar in the body exceeding 200 units may cause a diabetic coma.)
While it may seem like a lot, the majority of the organs perform their functions by simply existing. It’s when the organs fail, die, or go missing, is when the effects kick in.
Organ failure occurs when an organ sustains 65% damage. Upon failing, the organ will slowly deteriorate, and eventually die, at which point a transplant is needed.
