Homeostasis
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What this model shows
The person is a model. The temperatures (core 36.6–37.4 °C, forearm skin 26.0–34.5 °C) and the blood glucose concentrations (70–140 mg per 100 cm³ of blood) are typical values for a model person, not measurements of your own body.
The 10 minutes in each room, and the hours after the meal and the walk, are sped up into a few seconds.
The switches belong to the model only: a real body cannot switch sweating or shivering off. They show what each response does.
The glows along the neurones show where the impulses are; the green dots, the purple diamonds and the teal triangles show glucose, insulin and glucagon in the blood. Real impulses give out no light, and these substances cannot be seen in the blood.
The breath in the cold porch shows tiny droplets of water, condensed from the warm, moist breath.
With reduced motion each process is shown at one moment and then at its end, and the person does not shake while shivering: zigzag marks show it instead.
Select a piece of equipment or a part of the drawing to read about it in the card.