This card explains the insect tracheal system, including tracheae (chitin-lined tubes) and narrower tracheoles (without chitin), which serve as the primary sites for gas exchange.
Tato karta popisuje tracheální systém hmyzu, včetně trachejí (trubice s chitinovou výstelkou) a užších tracheol (bez chitinu), které jsou hlavním místem výměny plynů.
| Front | Tracheae In insects 3.1.1(f) |
|---|---|
| Back | - Tracheae (Tubes carrying air into body) lead away from spiracles - lined with chitin (withstand external pressure, but impermeable to gas so little gas exchange) - they branch (forming narrower tubes) until dividing into tracheoles (single elongated cells without chitin lining, so freely permeable) - tracheoles spread throughout tissues (running between individual cells), and is the site of most gasous exchange |
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