Here are the body systems involved in each function:
- Involuntary contraction of muscles: Muscular System
- Blood vessels constrict and dilate: Circulatory System
- Brain processes body temperature: Nervous System
The diagram shows the process of body temperature regulation.
When body temperature falls, information is sent to the brain that causes blood vessels to constrict so that heat is conserved. Sweat glands do not secrete fluid. Shivering, the involuntary contraction of muscles, generates heat, which warms the body. This helps the body retain heat and return to normal body temperature. When body temperature rises, information is sent to the brain that causes blood vessels to dilate, resulting in heat loss to the environment. Sweat glands secrete fluid. As the fluid evaporates, heat is lost from the body. This helps the body release heat to the environment and return to normal body temperature.
Regulating body temperature requires an interaction of body systems. Next to each function, select the body system it involves.
Circulatory System
Muscular System
Nervous System
Involuntary contraction of muscles
Blood vessels constrict and dilate
Brain processes body temperature
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