BIO Mod 13 Review

2. end of an animal that contains its tail
4. sessile, tubular form of a cnidarian with a mouth and tenteacles at one end and a basal disk at the other
6. free-swimming cnidarian with a bell-shaped body and tentacles
9. jellyfish are part of this Phylum
11. small capsules that contain a toxin which is injected into prey or predators, as found in organisms of the Phylum Cnidaria
13. animal that lacks a backbone
15. snails and slugs are in this Phylum
16. circulatory system in thich blood stays in vessels desgined to transport nutrients throughout the organism
17. this seminal structure is empty after an earthworm mates
18. end of an animal that contains its head

1. concentration of nerves and sensory organs in the anterior end of an organism
3. circulatory system in which blood is pumped through vessels into chambers/cavities that come into direct contract with cells and organs
5. this type of organism has 2 shells, for example, a clam
7. earthworms are segmented worms in this Phylum
8. term descibing an organism with both male and female reproductive organs
10. this creature is part of the Phylum Platyhelminthes
12. this animal is part of the Phylum Porifera
14. this earthworm structure absorbs oxygen and releases carbon dioxide as part of the respiratory function