INVERTEBRATESNematodes, Platyhelminthes, Annelids

GENERAL INFORMATION

Invertebrates- organisms that lack a back bone

Invertebrates are ecotherms (cold-blooded)

Represents 95%-99% of the animal kingdom

Multicellular

No cell walls

VOCABULARY

Parasite- an organism that lives inside of another organism and deprives the host of nutrients

Osmosis- the diffusion of fluids through membranes or porous partitions

Flame Cells- specialized excretory cell

Hermaphrodite- an organism in which reproductive organs of both sexes are present

Cephalization- development of a head by the concentration of feeding and sensory organs and nervous tissue at the anterior end

Clitellum- a ring or saddle-shaped region of glandular tissue in the body wall of certain annelids that produces a mucus to coat and protect eggs

VOCABULARY Spicules- Provide support in sponges

Polyp- Sessile; attached to one spot

Medusa- Free swimming

Osculum- Pores on sponges that release waste CO2

Filter feed- feed by straining suspended matter and food particles from water

One way digestive system- Mouth that takes in the food and anus is where the food is disposed

Two way digestive system- Only have one opening that takes in the food and dispossess it

VOCABULARY

Diffusion- Movement of molecules form high to low concentration

Osmosis- Movement of water molecules from high to low concentration

Endoskeleton- Internal skeleton like bony or cartilaginous skeleton

Exoskeleton- Hard outer layer that covers and protects the body

Cephalization- Having a head or not having a head (doesn’t matter)

Asexual-

VOCABULARY

Sessile- Permanently attached not able to move

Asymmetrical- Has a definite shape

Symmetrical- Arrangement of body parts around a center point

Bilateral- Can be divided into two similar halves when a line is drawn through a specific point

Radial- Can be divided into similar pieces by passing through many points

Clitellum- Forms mucus around the eggs

Nephridia- Excretory system gets rid of nitrogenous

NEMATODA

Symmetry: Bilateral

Movement: Back and fourth thrashing

NEMATODA

Nervous System: Present

Digestive System: One-Way

Excretory System: Present

Circulatory System: Osmosis

NEMATODE

Move by thrashing back and fourth

Rings around nervous system

Lives in soil and water

Parasites

Bilateral symmetry

Lives off plant, insects, animals or humans to survive and reproduce

Grow up to Eight meters

NEMATODA

Respiratory System: Osmosis

Skeletal or support system: No skeletal system, support through water

Reproductive System: Sexual

ANNELIDS Symmetry: Bilateral

Movement: Segmented body with 2 sets of muscles

ANNELIDS

Nervous System: Present (Sense organs and primitive brain) Digestive System: One-way Excretory System: Present Circulatory System: Diffusion

ANNELID

Respiratory System: Diffusion

Support System: Absent

Reproductive System: Sexual

ANNELIDS

Segmented body

Primitive brain

Sense of organs

Live in marine, freshwater and land

Have male and female organs

Have clitellum that forms mucus around eggs

Ring of nerves

EARTH WORM

ROUNDWORMS

Flatworm Diagram

PLATYHELMINTHES

Symmetry: Bilateral

Movement: Controlled by a longitudinal circular layers of muscles

Nervous System: Absent

Digestive System: Two way

PLATYHELMINTHES Excretory System: Present

Circulatory System: Osmosis/ Diffusion

Respiratory System: Osmosis/ Diffusion

Support or skeleton system: Absent

Reproductive System: Both asexual and sexual

PLATYHELMINTHES

Platyhelminthes means “Flatworm”

Parasitic worms

Live inn any moist areas

Nerve cords go across the body

Five groups of Platyhelminthes

3mm in length

TURBELLARIA

Flat worm tropical environment

TREMATODA

(Fluke) lives in intense conditions

CESTODA

Parasitic flat worm

EXAMPLES OF PLATYHELMINTHESTapeworm Fluke

INTERACTIVE INVERTEBRATES GAMES http://www.sheppardsoftware.com/content/animals/quizzes/invertebrates/invertebrateGame_1.html

http://www.butterflyschool.org/student/invertgame.html

http://sciencespot.net/Media/inverteclassactivity.pdf

https://www.brainpop.com/science/diversityoflife/invertebrates/preview.weml

http://www.biologycorner.com/quiz/phyla.html

INVERTEBRATES FUN FACTS VIDEOS https://www.youtube.com/watch?v=5E4TsarJk7Y

https://www.youtube.com/watch?v=WVsUkVTjZyg

https://www.youtube.com/watch?v=WVsUkVTjZyg

https://www.youtube.com/watch?v=vHlPNHQ3V94

https://www.youtube.com/watch?v=zWGPu84bLH4

WORKSITE

http://www.phs.d211.org/sped/gavindt/diff%20types%20digestive%20systems.htm

http://www.occc.edu/biologylabs/Documents/Cells%20Membranes/Diffusion_Definition.htm

http://www.bbc.co.uk/bitesize/standard/biology/investigating_cells/cells_and_diffusion/revision/4/

WORKS CITIED

Dictionary.com. Dictionary.com, n.d. Web. 05 Jan. 2015.

"Invertebrates." UXL Encyclopedia of Science. 2002, "invertebrate." The Columbia Encyclopedia, 6th Ed.. 2014, "invertebrate." The Oxford Pocket Dictionary of Current English. 2009, "invertebrate." World Encyclopedia. 2005, "invertebrate." A Dictionary of Biology. 2004, and AILSA ALLABY;MICHAEL ALLABY. "Invertebrates." Encyclopedia.com. HighBeam Research, 01 Jan. 2002. Web. 08 Jan. 2015.

"Invertebrates." - Kids Connect. N.p., n.d. Web. 08 Jan. 2015.

WORK CITED

http://www.encyclopedia.com/topic/Platyhelminthes.aspx

http://www.encyclopedia.com/topic/Platyhelminthes.aspx

http://www.livestrong.com/article/62037-characteristics-nematodes/