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Across
  1. 5. a common cavity at the end of the digestive tract for the release of both excretory and genital products in vertebrates (except most mammals) and certain invertebrates.
  2. 7. Line System a sensory system in fish and aquatic amphibians that detects vibrations, pressure changes, and water movement in their environment. It is composed of specialized organs called neuromasts
  3. 8. Fin is one of a pair of fins on the sides of a fish's body, located just behind the head, that are analogous to human arms
  4. 11. a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals.
  5. 13. Finned Fish because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called lepidotrichia
  6. 16. (heart) the two lower chambers that receive blood from the upper chambers (atria) and pump it to the rest of the body.
  7. 17. Fin is a fin on the back of aquatic animals like fish and marine mammals, and it functions primarily to provide stability and prevent rolling. Its specific uses vary
  8. 19. are the only known living animals that have a skull but no vertebral column, although they do have rudimentary vertebrae.
  9. 20. the two upper chambers of the heart that receive blood,
Down
  1. 1. (shark) looks like a shark that was squished like a pancake, fanning out its body toward the middle extremities
  2. 2. An ectotherm is an organism that relies on external sources, like the sun, to regulate its body temperature instead of producing heat internally
  3. 3. fin another term for tail fin.
  4. 4. a "lid" or covering found in several biological contexts, most commonly referring to the bony flap that covers the gills in bony fish or the flap of gum tissue that sometimes covers a partially erupted wisdom tooth.
  5. 6. a small elongated marine invertebrate that resembles a fish but lacks jaws and obvious sense organs. Lancelets possess a notochord and are among the most primitive chordates.
  6. 9. bowmouth guitarfish and belongs to the ray family
  7. 10. Finned Fish a type of bony fish with paired fins that are fleshy, rounded, and supported by a central bone, giving them a limblike structure.
  8. 12. Bladder an internal gas-filled organ found in most bony fish that controls buoyancy, allowing them to maintain their depth without expending energy
  9. 14. Lampreys are ancient, jawless, eel-like vertebrates with a long, snake-shaped body, a suction-disk mouth, and seven pairs of gill openings. While some species are parasitic
  10. 15. Scales also known as dermal denticles, are tooth-like structures that cover the skin of cartilaginous fish like sharks, rays, and skates. They
  11. 18. Squirt a marine invertebrate that spends most of its adult life attached to a hard surface, filtering food from the water