The Physical Unit is the physical body plus the physical mind. The physical unit consists of the physical apparatuses of the physical body (for example arms, legs, eyes, ears, and so on) as well as the Bodily Ego, neurologically identified with the Default Mode Network of the physical brain.
The phrase Physical Unit (PU) refers to the physical body, specifically as it functions as a container for incarnated Monadic Consciousness. The physical unit consists of the physical body itself and the mind that emerges as a consequence of the neurological and quantum operations that occurs inside the nervous system of the physical unit.
The Physical Unit refers to your physical body and all its various
- structures (e.g. brain, hippocampus, heart, skin, neurons, etc.),
- functions (e.g. Survival, Connection, and Expression) and
- energy flows (charkas, meridians, etc.) (Sosteric, SA1).
The PU may be conceptualized as a manifestation device, or a device designed to allow Consciousness to express within and manipulate the physical universe. As such, the physical unit was designed as a vehicle capable of expressing all Facets of Consciousness within the confines of the Physical Universe.
Development is the process of protecting, nurturing, and supporting the physical unit so it can contain high levels of Monadic Consciousness.
Consciousness enters the PU at conception and stays with the unit either until the resident monadic consciousness (RMC) decides to leave the PU, or the PU becomes damaged to the point that it can no longer contain the RMC.
Ideally one wishes to manifest inside a fully developed, healthy, and fully functioning physical unit. Toxic Socialization and a violent and abusive system prevent proper development, disconnect, and damage the physical unit. Damage occurs to the PU through accidental or deliberate trauma, abuse, and neglect. Damage and disconnection lowers the CQ of the physical unit and leads Pathology from which the individual must heal.
The physical unit has three basic functions.
Survival (instincts, survival programming, reflexes)
Connection (includes expression, self actualization, and "transcendence")
Sosteric, Mike. (SOA). The Science of Ascension: A Neurologically Grounded, Spiritually Sophisticated Theory of Mystical/Spiritual Experience. Unpublished. 
Sharp, Michael (GA). The Great Awakening: Concepts and Techniques for Successful Spiritual Practice.