The Cell Theory states that the cell is the basic unit of life, all living things are made up of cells, and that cells come from pre-existing cells.

Cell Theory

Organisms require energy to live. Because energy cannot be created or destroyed,  it is transformed from one form to another as organisms carry out essential tasks.

Energy Processing

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

Austin Community College

Biology

OpenStax Concepts of Biology provides the necessary breadth and depth for core Biology concepts.

Link: https://openstax.org/details/books/concepts-biology/

OpenStax Biology 2nd Edition

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.

Neuroscience (Neurobiology)

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

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