Exam 2 Review

123456789
Across
  1. 3. System of tiny tubes for direct gas exchange in hexapoda
  2. 5. Arthropods with book lungs/ trachea
  3. 8. Lipid protein with lipid layers underneath that is water impermeable and pierced by sensory hairs & glandular openings
  4. 9. A process where old cuticle is partially degraded by enzymes & split
Down
  1. 1. a type of insect development with complete metamorphosis, characterized by four distinct life stages: egg, larva, pupa, and adult
  2. 2. Openings in the heart that allow blood to reenter after circulation
  3. 3. groupings of the body like the head thorax and abdomen
  4. 4. External openings that serve as exit and entry points for the respiratory system
  5. 6. jointed and hardened chitinous exoskeleton with intrinsic musculature produced by epidermis
  6. 7. Simple eye structure