Marine Worms Flatworms Tapeworms Segmented Worms Roundworms and
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Marine Worms (Flatworms, Tapeworms, Segmented Worms, Roundworms, and Giant Tube Worms)
General Stuff About Worms… • Worms are found pretty much everywhere in the ocean. • Most worms tend to live near the seafloor. • Some of the worms we will be discussing are parasitic. • There a number of different groups , or phylums, each having it’s own distinctive characteristics.
Worms, Worms!
Phylum- Platyhelminthes (aka: Flatworms) § Have flat bodies. § Found in both fresh and salt water. § Can range in size from microscopic to nearly 20 meters (60 feet!) § Have bilateral symmetry. § Move by contracting muscles and beating of cilia. § Have a very simple nervous system. § Have a very simple digestive system. § Reproduce asexually (regeneration) or sexually (hermaphrodite).
Flatworms
Flatworms http: //www. youtube. com/watch? v =o. Te. SIP_e. Pkw
Flatworms
Tapeworms § These worms are parasites. § They live in or on the body of a host organism. § They do not need digestive systems because the absorb nutrients directly from the host into their own bodies. § Some examples are: Blood fluke, Liver Fluke, Trematode.
Tapeworms
Let’s go to the Video!
That’s just Nasty!!! • http: //www. youtube. com/watch? v=8 FYg QFSr. ZDE&NR=l • http: //www. youtube. com/watch? v=ESSZ MF 578 Ig
Roundworms • These are the most common type of worm. • There about 10, 000 different species of roundworm! • They generally live at the bottoms of oceans, and burrow in sand mud. • They whip their bodies back and forth to move around. • Some can swim. • They belong to the phylum Nematoda. • There are two sexes, but some are still hermaphroditic.
Roundworms
Intestinal Roundworm Infestation
Segmented Worms • Typically found in moist soil or sand. • Belong to the Phylum “Annelida”. • There are more than 10, 000 species of segmented worms. • They have a well developed digestive, circulatory, and nervous system. • They breathe through their skin and have moist bodies. • Oxygen and Carbon Dioxide diffuse through the skin.
Segmented Worms
- Annelida phylum
- Reviewing key concepts: flatworms, annelids, and roundworms
- Mollusks
- 5 advanced characteristics shared by cephalopods
- Section 27-1 flatworms
- Acoelomate
- Annelid worms
- Chapter 25 section 3 mollusks
- Annelida
- What are some invertebrates
- Importance of annelida
- Segmented worm characteristics
- Bilateral symmetry worms
- Platyhelminthes
- Acropora common name
- Where is a flatworms mouth
- Flatworm asexual reproduction
- Roundworms bilateral symmetry