Assignment question: Write exhaustively on how livestock thermoregulate using the pig as a model.

This question reproduces the assignment’s central thermoregulation task. A complete response compares cold and heat responses and includes both physiological and behavioral strategies. Cold responses include reduced peripheral blood flow, shivering, huddling, bedding use, and potentially increased feed consumption. Heat responses include skin vasodilation, panting, increased respiratory rate, and reduced appetite. Because pigs release little skin moisture, heat dissipation is a particular concern. **Key takeaway:** Describe thermoregulation as coordinated physiological and behavioral responses, not as a single mechanism.\n\n**Glossary:**\n- **Peripheral blood flow**: Blood flow to body regions away from the core.\n- **Vasodilation**: Widening of blood vessels, increasing blood flow.\n- **Thermoneutral zone (TNZ)**: Range in which body temperature can be maintained with relatively little extra thermoregulatory effort.