INSECT TRACHEAL SYSTEM

• WHAT ARE THE KEY FEATURES OF AN INSECT TRACHEAL SYSTEM?

  trachea, tracheoles, spiracles
• WHAT ARE SPIRACLES?

  round, valve-like openings along the length of the abdomen
• WHAT HAPPENS IN THE SPIRACLES?

  • O2/ CO2 enter or leave via these
  • trachea attach here
• WHAT ARE TRACHEA?

  network of internal tubes
• WHAT DO TRACHEA HAVE?

  rings of cartilage within them to strengthen/ keep them open
• WHAT ARE TRACHEOLES?

  branches off the trachea, which are smaller and go deeper into the abdomen
• WHAT DO TRACHEOLES DO?

  extend throughout all tissues to deliver O2 to respiring cells