“A Brain Heater in the Swordfish”, 1982-06-18 (; backlinks):
The brain and eye of a swordfish are warmer than the water. Associated with one of the eye muscles is a tissue that heats the brain.
This brain heater is rich inmitochondria and cytochrome c and is supplied with blood through a vascular heat exchanger.
It protects the central nervous system from rapid cooling during daily vertical excursions which may take the swordfish through a wide temperature range.
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