Cycle

Cycle is a sequence of events that repeats in the same order. In the context of biology, a cycle can refer to various biological processes that occur in a cyclic manner, such as the cell cycle, menstrual cycle, or circadian rhythm.

Overview

A cycle is a series of events or processes that recur regularly and usually lead back to the starting point. In biology, cycles are fundamental to the functioning of life. They regulate various biological processes, from the smallest scale of cell division to the largest scale of ecosystem dynamics.

Biological Cycles

Cell Cycle

The cell cycle is the process by which a cell grows, duplicates its DNA, and divides into two daughter cells. This cycle is crucial for the growth and development of organisms, as well as for the repair and maintenance of tissues.

Menstrual Cycle

The menstrual cycle is a monthly cycle in females of reproductive age that prepares the body for pregnancy. It involves changes in hormone levels, the growth and release of an egg from the ovaries, and changes in the lining of the uterus.

Circadian Rhythm

The circadian rhythm is a natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours. It can refer to any biological process that displays an endogenous, entrainable oscillation of about 24 hours.

Other Cycles

In addition to biological cycles, the term "cycle" can also refer to various processes in other fields, such as the water cycle in environmental science, the business cycle in economics, or the life cycle in product development.

See Also

• Cell division
• Ecosystem
• Hormone
• Ovary
• Uterus

Cycle Resources
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