animal vocab

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Across
  1. 2. animals that neither develop nor retain a vertebral column
  2. 4. accompanied by or requiring the absorption of heat.
  3. 5. a unique hydraulic system found in echinoderms (like starfish and sea urchins) that facilitates locomotion, feeding, respiration, and sensory perception, using a network of fluid-filled canals and tube feet.
  4. 8. an organism that has both male and female reproductive organs
  5. 9. type of jellyfish (Cnidaria), a submarine cable system, or a marine surveying business
  6. 13. Bladder a gas-filled organ in fish that helps them control buoyancy, allowing them to maintain their depth in the water without sinking or floating.
  7. 17. the biological process where an animal sheds its outer layer (like skin, feathers, fur, or shell) to make way for new growth.
  8. 18. animals whose body temperature is primarily regulated by external sources, like the sun or a heated rock, rather than internal metabolic processes.
  9. 19. an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
  10. 20. an abnormal growth of tissue that protrudes from a mucous membrane
  11. 21. (of a plant) having or developing buds
Down
  1. 1. a tough, flexible connective tissue that plays a crucial role in the musculoskeletal system
  2. 3. anything related to or occurring at the bottom of a body of water
  3. 6. a type of symmetry where body parts are arranged around a central axis, like spokes on a wheel, allowing the organism to be divided into similar halves by any plane passing through the center
  4. 7. Glands modified sweat glands that produce and secrete milk for lactation in mammals
  5. 10. lack of equality or equivalence between parts or aspects of something; lack of symmetry.
  6. 11. Symmetry the property of being divisible into symmetrical halves on either side of a unique plane.
  7. 12. a temporary organ that develops in the uterus during pregnancy and provides nutrients, oxygen, and protection to the growing fetus.
  8. 14. a hard, external skeleton that supports and protects the bodies of many invertebrates, particularly arthropods, and some mollusks, acting as a barrier against predators and environmental hazards
  9. 15. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
  10. 16. Eggs a type of egg laid by reptiles, birds, and some mammals