Crossword Review Exam 4a: Ch 24, 25, 32

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Across
  1. 4. The extracellular matrix of blood, which is mainly fluid
  2. 5. Animals in this phylum all have a muscular foot, a visceral mass and a mantle. Examples include clams, snails and octopus
  3. 8. One defining feature of all mammals is the presence of ______ glands which provide milk to newborns.
  4. 10. An animal that is not able to control its internal body temperature using its own metabolic reactions (name means “outside temperature”)
  5. 15. Earthworms and leeches in the phylum Annelida are also called ________worms because they show true segmentation of their body (the body is divided into external and internal repeating units).
  6. 16. Animals in this class of vertebrates undergo a metamorphosis as they develop from the larval tadpole stage to the terrestrial adult stage. They are able to breathe through their skin.
  7. 19. Animals within the phylum Cnidaria (jellyfish, corals) are ____ (plural) because they only have 2 embryonic tissues or germ layers.
  8. 21. These sponge cells are tube-shaped and form pores in the sponge’s body (plural).
  9. 23. This group (plural) of Arthropods are in the subphylum Hexapoda because they have 6 walking legs. They also have 1 pair of antenna, 1 pair of compound eyes and their body is divided into three segments (head, thorax and abdomen).
  10. 25. The flatworms in the phylum Platyhelminthes have no body cavity and so are called ________(plural).
  11. 28. A type of protein fiber found in the extracellular matrix of several types of connective tissue. It is strong and flexible, but resistant to stretching
  12. 29. The name for a true body cavity.
Down
  1. 1. The number of tissues sponges have
  2. 2. The life stage of the jellyfish that is asexual and sessile (immobile) where the mouth is pointed up
  3. 3. Most animals have three embryonic tissue layers. The middle layer is called the _____.
  4. 6. This cushy material is found in the ears and nose and in between certain joints to add cushion, like the knee cap and in between the vertebral discs
  5. 7. The phylum Cnidaria (jellyfish and corals) have this type of body symmetry.
  6. 9. Class ______ within the subphylum Vertebrata are the jawless fishes like lamprey. This group lacks fins, scales and jaws
  7. 11. A process by which living organisms constantly adjust to internal and external changes to maintain a steady state in their body
  8. 12. The large opening in a sponge where water exits the body
  9. 13. The four types of tissues are epithelial, connective, nervous and _______
  10. 14. A single layer of epithelial cells is called _______ epithelia
  11. 17. Animals in the class _____(clams, mussels and oysters) have two hard shells surrounding their body that are held together by a hinge. They also have a poorly developed head and a muscular foot used for digging in the sand.
  12. 18. One of the defining features of a vertebrate is the _______, a cartilaginous rod found between the digestive tract and the dorsal hollow nerve cord, which becomes the vertebral column after development in vertebrate animals.
  13. 20. An animal that does not have a backbone
  14. 22. The part of the neuron that receives impulses from other neurons and sends the impulse to the cell body
  15. 24. This type of muscle tissue is found in the heart and is controlled involuntarily
  16. 26. Tall, narrow-shaped epithelial cells are called ______
  17. 27. Evolution of the ______ egg is what allowed reptiles, birds and mammals to colonize dry areas of land.