This lesson plan teaches students who are blind or visually impaired how the human body self-regulates to maintain a stable internal environment despite changes in the external environment -- a process called homeostasis. Students will:
- Understand how the human body regulates temperature and how a fever fights infection
- Explore ways in which the human body self-regulates to maintain homeostasis
Background Information: When Body Temperature Overheats
- Sweating leads to dehydration. When you sweat a lot, you lose water and need to drink to replace fluids leaving the body.
- Carbon dioxide builds up in the body's cells, when the body temperature overheats. This leads to poor circulation.
- Blood volume decreases. Your heart has to work harder because of dehydration, which means less blood volume in your body.
- Breathing gets rapid. Breathing becomes fast and deep to increase oxygen level and decrease CO2 level.
- Skin gets more blood. When body gets hot, more blood goes to skin surface and you sweat to cool blood and body.
- Kidneys respond. When body gets dehydrated, kidneys must work more to rid body of salt and to keep more water in body. Urine gets concentrated.
Suggested time: Two 30-minute periods