By keeping fit means being physically active I would say your joints and muscles because of the movement,your heart to promote a healthy blood flow to pump you blood and speed up your heart rate to burn calories,and the liver because it helps to rid the body of harmful toxins.
8 or more of the 12 organ systems.
pipe organ
Homeostasis is the mechanism involved in keeping body systems normal. It refers to the body's ability to regulate internal conditions such as temperature, pH, and blood sugar levels within a narrow range to ensure optimal functioning.
The major organ systems involved in metabolism are the digestive system, which breaks down food into nutrients for energy, and the endocrine system, which regulates metabolism through hormones. The major organ systems involved in excretion are the urinary system, which removes waste from the blood in the form of urine, and the respiratory system, which eliminates carbon dioxide.
All the organ systems in the body make up an organism.
The primary organ involved in water absorption in the human body is the small intestine.
The two organ systems most involved in homeostasis are the nervous system and the endocrine system. The nervous system helps to quickly regulate changes in the body, while the endocrine system releases hormones that help to maintain the body's internal balance. Together, they work to keep the body's systems functioning properly.
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Explain the mechanisms involved in disrupting body systems?
The body itself is not an organ; rather, it is composed of a collection of organs, tissues, and systems that work together to facilitate movement. Muscles, bones, and joints are key components that enable the body to move.
That is the organismal level. Many organisms have several organ systems.
The kidneys