Human body is nourished and energized by the circulatory distribution of the assimilable energy products of nourishment.  Gland chemistry of certain glands comparable to the pituitary bodies effects inherent imagination and spiritual receptivity. 
When a living cell is injured, it possesses the ability to elaborate certain chemical substances which are empowered so to stimulate and activate the neighboring normal cells that they immediately begin the secretion of certain substances which facilitate healing processes in the wound. 
The body cells of the Material Sons are far more resistant to disease than human beings. The body cells of humans are akin to the living disease-producing microscopic and ultramicroscopic organisms of the realm. These facts explain why we the Urantia peoples must do so much by way of scientific effort to withstand so many physical disorders. We would be far more disease resistant if our races carried more of the Adamic life. 
To a certain extent, the appearance of the material body-form is responsive to the character of the personality identity; the physical body does, to a limited degree, reflect something of the inherent nature of the personality.  The spirit is the architect, the mind is the builder, the body is the material building. 
The angels cannot transport combustion bodies—flesh and blood—such as we now have, but they can transport all others, from the lowest morontia to the higher spirit forms.  After death, body is discarded. Body becomes a duscarded outer covering. 
In the physical life, mortals may be outwardly beautiful though inwardly unlovely; in the morontia life, and increasingly on its higher levels, the personality form will vary directly in accordance with the nature of the inner person.