According to the Genetics Kit, in a Generation 1 Norn there are 20 organs.
CNS - Drive Lobe Support
CNS - Concept Lobe Support
CNS - Decision Lobe Support
Time's Arrow
Controls aging.
Environmental Interface
Senses the external environment, such as air quality, light availability, etc. Also senses the species, gender, and kinship of nearby creatures.
Muscle
Heart
Controls oxidation. Injured by cyanide.
Lung
There are two separate lung organs. They control breathing.
Liver
When a creature is in peril, the liver converts glycogen into glucose. The liver also detoxifies a creature from alcohol, ammonia, lactate, and cholesterol.
Pancreas Beta Cells (Insulin Activity)
Converts excess glucose into adipose tissue or glycogen.
Pancreas Alpha Cells (Glucagon Activity)
When glucose is too low, converts adipose tissue and glycogen to glucose.
Tummy
Starch, Fat and Protein from food is broken down into glucose, fatty acids, and amino acids.
Kidney
Bones
Refers to the bone marrow and controls immune function/healing. Often killed by heavy metals.
Spleen
Creates antibodies to fight against antigens.
Skin
Cools the creature by sweating.
Gonad
Contains most of the reproductive genes and produces sex hormones.
Uterus
Present in females. A female needs a uterus to become pregnant and lay an egg.