Here's a breakdown of the major components:
* Water: As mentioned above, water is the most abundant substance in the body. It's essential for many bodily functions, including regulating temperature, transporting nutrients, and removing waste.
* Cells: These are the fundamental units of life and make up a significant portion of the body.
* Other Molecules: The body is also composed of various other molecules, including:
* Proteins: Essential for structure, function, and regulation.
* Lipids (fats): Provide energy storage, insulation, and protection.
* Carbohydrates: Primary energy source for the body.
* Nucleic acids (DNA and RNA): Store and transmit genetic information.
* Minerals: Important for various bodily functions, such as bone health, nerve function, and muscle contraction.
The exact composition varies depending on factors such as age, sex, and body mass.