Nematodes
Emily, Teegan, Matt
Block 2
Plant and Animal Biology
Nematodes

Multicellular animal

Simple Structure

Adult – 1,000 somatic cells

Digestive, nervous, excretory and reproductive system.

0.3mm- 8m

Feed on bacteria, fungi, and other organisms

Small but very dangerous
"Nematodes in General." Nematodes in General.
N.p., n.d. Web. 02 Oct. 2015.
Nematodes

Symmetry


Bilateral
Movement

Flexes

Contraction of longitude muscles

High internal pressure

No cilia present
"The Digestive System and Its
Nematoda Phylum." Digestive System.
N.p., n.d. Web. 02 Oct. 2015.
Bilateral Symmetry
Nervous System

Present

Pharyngeal nerve ring

Ventral nerve cord

Dorsal Ventral
 Longitude

Spine like

Nerve fibers

axis
Solid-double strand
"Introduction to the Nematoda." Introduction to the
Nematoda. N.p., n.d. Web. 02 Oct. 2015.
Digestive System

One way system

Mouth

Anus
"The Digestive System and Its Nematoda Phylum." Digestive System. N.p., n.d.
Web. 02 Oct. 2015.
Excretory System

2 openings

Waste leaves body


Outer layer of skin
Salt leaves through body

Pores
"NEMATODE." NEMATODE. N.p., n.d. Web. 02 Oct. 2015.
Circulatory System

Diffusion/ Osmosis

No Blood Stream
"Nematoda." Nervous System. N.p., n.d. Web.
02 Oct. 2015.
Respiratory System

Diffusion/ Osmosis

Cutaneous

Respiration through skin
"Introduction to the Nematoda." Introduction to the
Nematoda. N.p., n.d. Web. 02 Oct. 2015.
Skeletal System

Absent

Cuticle- not a “True” skeleton

Outer layer

Rigid, flexible, molts (sheds)

Limits motion

Hypodermis under cuticle

Large cell

Muscles

All muscles run lengthwise
"Nematoda." Skeletal System. N.p., n.d. Web. 02 Oct. 2015.
Reproductive System

Sexual
"Reproductive
Systems of
Nematodes."
Reproductive
Systems of
Nematodes. N.p.,
n.d. Web. 02 Oct.
2015.
Ascaris
(Parasitic Roundworm)

Use body as hosts

Mature from larva to adults

Reproduce inside intestines

Most Common infection

Transmitted


Unsafe food and water
Affect dog, cat, humans
"Ascaris Lumbricoides (human Intestinal
Roundworm)." Animal Diversity Web. N.p.,
n.d. Web. 02 Oct. 2015.
Hookworm
(Parasitic Roundworm)

Live off humans

Affect lungs and small intestine

Live in soil

Enter through feet

Suck blood

Travel in blood stream

Enter lungs

Travel through windpipe

Go to intestines
"Hookworm Infection Infectious Diseases." Merck
Manuals Professional
Edition. N.p., n.d. Web. 02
Oct. 2015.
Filaria
(Parasitic Roundworm)
 Elephantitis
 Gross
condition
 Body parts enlarge
 Obstruction with Lymphatic System
 Circulatory
system
 Vital to immune system
 Carry clear fluid
 Lymph fluid
 Travel
towards heart
"Lymphatic Filariasis."
Lymphatic Filariasis.
N.p., n.d. Web. 02
Oct. 2015.
Phylum Facts

Commonly referred to as Roundworms



Body structure
Live anywhere

Found in organisms

Damp locations

Soil

Food

Water
Parasites

Organism lives in another (Host)

Dependent for survival

Feed on
Yeh, Jennifer, Robert McSorley, "Nematoda." The Columbia
Encyclopedia, 6th Ed.. 2015, Michael Allaby, "Nematoda." A
Dictionary of Biology. 2004, AILSA ALLABY;MICHAEL ALLABY,
"nematode." A Dictionary of Nursing. 2008, "nematode." The Oxford
Pocket Dictionary of Current English. 2009, "nematode." World
Encyclopedia. 2005, and "nematode." Oxford Dictionary of Rhymes.
2007. "Nematoda." Encyclopedia.com. HighBeam Research, 01 Jan.
2002. Web. 02 Oct. 2015.
Pseudocoelom
(Soo-doo-see-lum)

Advancement

Fluid filled body cavity

Contains organs

Not in place

Not a “True” body cavity

Shows development

Coelom

More advanced

Full body cavity

Adult hood
Dictionary.com. Dictionary.com, n.d. Web.
02 Oct. 2015.
Fun Facts

1 bucket soil= 1 million

1 rotten apple= 90,000

Feed on anything

Live in any habitat

Cause serious disease

12,000 species known- million estimated
"Root-knot Nematode." Root-knot
Nematode. N.p., n.d. Web. 02 Oct.
2015.