Biological rhythms are internal cycles of biological activity that appear as recurring patterns of bodily change. These cycles can vary in length, such as a menstrual cycle that takes about $$28$$ days or a body-temperature cycle that changes over about $$24$$ hours.

Biological Rhythms

The study of biological timing or "clocks" in living organisms.

Trinity College (CT)

Biology

All living things have the following characteristics: 
- Order
- Respond to Stimuli
- Reproduction
- Adaptation
- Growth & Development
- Homeostasis
- Energy Processing
- Evolution

Characteristics of Living Things

The human anatomy is comprised by many body systems, including:
* Nervous system
* Respiratory system
* Circulatory system
* Gastro-Intestinal (digestive) system
* Skeletal system
* Endocrine system
* Reproductive system
* Lymphatic system
* Immune system

Human Anatomy

The study of small organisms ranging from one cell to few cells to no cells at all. It encompasses fields such as virology, bacteriology, protistology, & mycology.

Microbiology

The scientific field of study of nervous system function and development. The human nervous system is comprised of the central (brain and spinal cord) and peripheral  (nerves and ganglia branching from brain and spinal cord) nervous systems. These are referred to as the CNS and PNS, respectively.

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