This card describes spiracles and sphincters in insects, highlighting their closure to conserve water and opening for increased oxygen demand.
Tato karta popisuje průduchy (spiracles) a svěrače u hmyzu, přičemž zdůrazňuje jejich uzavírání pro omezení ztráty vody a otevírání při zvýšených nárocích na kyslík.
| Front | Spiracles and sphinctors 3.1.1(f) |
|---|---|
| Back | - insects have spiracles (small openings) where air enters/leaves - Sphinctors open/close spiracles (closed mostly to limit water loss) - if insect inactive, sphinctors closed, if active (high O2 demands/CO2 build up) , more spinctors open |
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