Biology Exam 4
Order by
22 terms
Terms | Definitions |
|---|---|
 porifera | phylum of sponges |
| spongoceol | large internal cavity of sponge |
| osculum | where water exits the sponge |
| amoebocytes | specialized cells in sponges that distribute nutrients through the mesohyl |
| choanocytes | specialized cells responsible for removing food from water |
| spicules | the skeletal structure of sponges is made from ___ |
| cnidaria | phylum of corals jellyfish and hydra |
| hydrozoa | class of hydra and obelia |
| scyphozoa | class of jellyfish |
| anthozoa | class of sea anemone and coral |
| statocysts | ctenophores tell direction using ___ |
| tapeworms | the life cycle of these animals involves two hosts, generally cattle such as bovine cattle or pigs where they begin their life cycle. Their life cycle is completed in humans and generally involves attaching to the host through a myriad of organs such as suckers, hooks etc. where they use the surface of their body to absorb nutrients from the host since they do not have a gastrovascular cavity. Behind the scolex is a long ribbon of segments called proglottids which are sex organs used to develop thousands of eggs which are released in the feces of the host. |
| fluke | the life cycle of these trematodes involves multiple intermediate hosts. The adult parasite lives and reproduces in the definitive host, usually a human. The resultant embryos are called miracidia are released which transform into sporocysts. The sporocysts reproduce asexually to produce more sporocysts which are called rediae. The rediae than reproduce asexually to produce cercariae. Snails eat the cercariae. The cercariae bore their way out of the snail and infect their second intermediate host, fish, by entering the gills. The trematodes infect their definitive host by boring into the feet of people in the water or by the consumption of raw fish infected with juvenile ___ |
| platyhelminthes | phylum of flatworms |
| turbellaria | class of platyhelminthes [example: planarians] |
| monogenea | class of platyhelminthes [example: flukes (fish)] |
| trematoda | class of platyhelminthes [example: flukes (parasite)] |
| cestoda | class of platyhelminthes [example: tapeworms] |
| ocelli | planarians see with its ___ |
| parthenogenesis | process by which diploid eggs that have not undergone meiotic division develop into females. |
| reproduction of rotifers | some reproduce by parthenogenesis while others use unfertilized eggs to develop into females and others develop into degenerate males that cannot feed and live long enough to produce and release sperm to fertilize females. The resultant fertilized cells develop into zygotes which have thick shells used to survive harsh conditions such as absence of water etc. |
| Ascaris lumbricoides | a type of roundworm (nematode) that infects the small intestines and can reach lengths of 30cm. It infects over a billion people worldwide generally in countries with poor sanitation.Eggs pass out in feces and remain in soil for years. The A. lumbricoides is common in the rural areas of southeastern U.S. Eggs require ingestion before hatching. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.