Robert Jan "Roy" van de Hoek, RC
322 Culver Blvd., Suite 317
Playa del Rey, California 90293
Of life's cycles, these are the most fundamental:
The WATER cycle provides the supportive surroundings in which life can exist. The bodies of all living beings are largely water.
The NITROGEN cycle ... [to be compiled completely at a later time].
The CARBON cycle
The SULFUR cycle
The PHOSPHORUS cycle
The acronym CHNOPS [pronounce the C as S] is a handy way to remember that all organisms contain fixed proportions of the elements carbon, hydrogen, nitrogen, oxygene, phosphorus, and sulfur - a powerful indication of the close evolutionary connections between all forms of life.
We also apply term "cycles"to astronomically determined events that repeat themselves periodically, often with dramatic effects on the rhythms of life. For many beings who live along the sea, the ceaseless, twice-daily ebb and flow of the tides brings food, removes wastes, and provides the interminent moisture and drynessneeded for feeding or protections. We humans wake at dawn, are active during the day, and get sleepy after nightfall - though many other mammals do the opposite. Organisms have "internal clocks" that regulate important daily cycles in body chemistry and behavior. Agriculture, gardening, sports, and many other human activities are shaped by the alternation of warm spring and summer periods of growth with chilly fall and winter periods of rest - or, near the equator, wet and dry seasons. Pyschological states are strongly influences by these cyclels; we ritualize them inways that all of life is cyclical.