Human body

The physical structure of a human being, composed of cells organized into tissues, organs, and interacting organ systems.

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Cell: The smallest structural and functional unit of living organisms. Human tissues are built from specialized cells.
Homeostasis: The regulation of internal conditions within ranges that sustain an organism. Body systems continually adjust conditions such as temperature and blood chemistry.
Anatomy: The study of the structures of living organisms and the relationships among them. It provides the structural vocabulary for describing the human body.
Human evolution: The evolutionary history of the human lineage, including changes in anatomy and behavior. Inherited anatomical traits reflect adaptations across human evolutionary history.
Mind–body problem: The philosophical question of how mental phenomena relate to the physical body. It asks whether bodily structure can fully explain mental experience.
Tissue: A group of similar cells and their surrounding material that performs a shared function. Tissues combine specialized cells into larger functional structures.
Circulatory system: The heart, blood, and vessels that transport substances throughout the body. It distributes oxygen, nutrients, hormones, and heat among tissues.
Physiology: The study of how living organisms and their parts function. It explains how body structures perform and coordinate their functions.
Human development: The process by which a human grows and changes from conception through adulthood. Development builds the body and reshapes its proportions over time.
Human microbiome: The communities of microorganisms that inhabit the human body and their collective genetic material. Microbes live within and on the body but are not human tissues.