The document discusses how the human body is affected by extreme heat in Death Valley. It notes that the body can lose large quantities of salt and water due to lack of water and sweating, which can lead to dizziness and nausea. The heart must pump more blood and blood vessels dilate to accommodate increased blood flow in high temperatures. Common experiences in excessive heat include muscle cramps and spasms. Clothing and items are needed to help the body maintain homeostasis in this harsh environment.

1. Death Valley

2. Brain System Due to lack of water and prolonged sweating, the body: Loses large quantities of salt and water Dizziness occurs Nausea

3. Cardiovascular System High temperatures in the desert may cause: The heart to pump more blood Blood vessels dilate to accommodate the increased flow www. crh.noaa.gov /images/pah/pdf/heatsafety.pdf

4. Musculatory System Common experiences with excessive heat: Muscle cramps Muscle spasms

5. Clothing/Items Needed to maintain Homeostasis