lecture 5 animal evolution the invertebrates
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Lecture 5 Animal Evolution – The Invertebrates

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Lecture 5 Animal Evolution – The Invertebrates. Their body plans. Divided into forebody & hindbody . Forebody appendages : four pair of legs, pair of pedipalps with sensory roles & a pair of chelicerate that wound/ put venom into prey. Hindbody appendages :

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their body plans
Their body plans
  • Divided into forebody & hindbody.
  • Forebody appendages:
    • four pair of legs, pair of pedipalps with sensory roles & a pair of chelicerate that wound/ put venom into prey.
  • Hindbody appendages:
    • spin out silk threads for webs and egg cases.
  • Open circulatory system-blood pumped into tissues, blood received through small openings in its wall.
  • Have Malphigian tubules
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