| Physiological Element | Description | Species |
| Axonal Amplifier | Bioelectronic device of Borg Origin, believed to be some type of neuroprocessor | Borg |
| Brak'Lul | Term for Klingon biological redundancy | Klingon |
| CPK | Creatnine phosophokinase, marker of muscular damage. Mostly used to diagnose cardiac damage | |
| Genetic Resequencing Vector | Medical suspension formulated to s hut down Borg Nanoprobes as they emerge from dormancy | Borg |
| Hypothalmus | Controls body temperature | |
| Ionic interference | Can block telepathy | Betazoids |
| Isoboromine | Trill neurotransmitter that allows the host and the symbiont to communicate. Isoboramine levels below 40% require removal of the symbiont which is fatal to the host. | Trill |
| Microcentrum Cell membrane | Physical attribute of life forms unaffected by triolic waves | Shapeshifters |
| Microcircuit Fibers | Part of the Borg Devices that cause cellular DNA to change making surgical removal impossible while the implants are active | Borg |
| Paracortex | Part of the brain responsible for telepathy | Betazoids |
| Peritoneum | Membrane lining the abdominal cavity in many humanoid species | Humanoids |
| Pheromones | Biochemicals secreted by many carbon based life forms, who's scent affects the behavior of other members of the same or similar species | |
| Psiosynine | Telepathic Neurotransmitter | Betazoids |
| REM Sleep | In neorophysiology, REM (rapid eye movement) describes a normal state of sleep during which most humanoid dreaming occurs. The condition is so named because the sleeper's eyes, though closed, will often exhibit rapid movement. | Humanoids |
| Reticular Formation | A system of cells in the medula oblongata of many humanoid brains | Humanoids |
| Septal Area | aka the septum lucidum, it is the double membrane that separates the anterior horns of the lateral ventricles of a humanoid brain | Humanoid |
| Serotonin | Enzyme that serves as a central neurotransmitter in humanoid nervous systems. Increased levels makes a patient susceptible to influence | Humanoid |
| T-Cells | A type of lymphocyte which enables humanoid bodies to fight infection | Humanoid |
| T-Negative | Rare Vulcan blood type | Vulcan |
| Thalamus | A portion of the humanoid brain, deep within the cerebrum hemispheres that relays bodily sensations to the cortex for interpretation | Humanoid |
| Thymus | Organ in humanoid bodies, located anterior to the trachea which produces T-Cells | Humanoid |
| Vek'Tal Response | A measure of Klingon physiological condition | Klingon |