Across
- 2. 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.
- 4. Animals in this phylum all have a muscular foot, a visceral mass and a mantle. Examples include clams, snails and octopus
- 8. 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
- 11. One defining feature of all mammals is the presence of ______ glands which provide milk to newborns.
- 12. Specialized stinging cells in the phylum Cnidaria (jellyfish, corals) that are located in the tentacles around the mouth (plural)
- 14. A single layer of epithelial cells is called _______ epithelia
- 15. This type of muscle tissue is found in the heart and is controlled involuntarily
- 16. An animal that does not have a backbone
- 17. A process by which living organisms constantly adjust to internal and external changes to maintain a steady state in their body
- 20. The four types of tissues are epithelial, connective, nervous and _______
- 21. 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).
- 22. 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
- 24. The part of the neuron that receives impulses from other neurons and sends the impulse to the cell body
- 26. The name for a true body cavity.
- 27. The extracellular matrix of blood, which is mainly fluid
Down
- 1. 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.
- 2. Evolution of the ______ egg is what allowed reptiles, birds and mammals to colonize dry areas of land.
- 3. 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.
- 5. Tall, narrow-shaped epithelial cells are called ______
- 6. The flatworms in the phylum Platyhelminthes have no body cavity and so are called ________(plural).
- 7. These sponge cells are able to trap food particles and can also become swimming sperm (plural).
- 9. The phylum Porifera (sponges) has this type of body symmetry.
- 10. Animals within the phylum Cnidaria (jellyfish, corals) are ____ (plural) because they only have 2 embryonic tissues or germ layers.
- 13. The large central cavity inside a sponge.
- 18. An animal that is not able to control its internal body temperature using its own metabolic reactions (name means “outside temperature”)
- 19. Most animals have three embryonic tissue layers. The middle layer is called the _____.
- 23. Class ______ within the subphylum Vertebrata are the jawless fishes like lamprey. This group lacks fins, scales and jaws
- 25. 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).