Kingdom: Animalia, Phylum: Nematoda, Species: Ascaris lumbricoides

Top: Female

Bottom: Male

Male is usually smaller, has a hooked tail, and has spicules projecting from the genital opening.

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Ascaris sp male anatomy

Know: cuticle, intestine, pseudocoel, testes.

1. Cuticle

4. Testis

6. Intestine

7. Pseudocoel

Female Ascaris anatomy

Know: cuticle, intestine, pseudocoel, uterus, ovary, oviduct

Kingdom: Animalia, Phylum: Nematoda, Species: Enterobius vermicularis

Common name: Human pinworm

Live in the large intestine and appendix in humans. Gravid females migrate to the colon (usually at night) and lay eggs around anal opening. They may burst and eggs contaminate clothing and bedsheets. Often get into air and contaminate entire household.

Symptoms: Anal and vaginal itching.

Interesting: Can also rarely cause behavior problems and nightmares.

Kingdom: Animalia, Phylum: Nematoda, Species: Necator americanus

Common name: American hookworm

Infective 3rd stage juveniles penetrate bare skin, enter the blood stream, are carried to the heart, then enter the lungs. They are coughed up, swallowed, and then mature in the digestive tract.

Phylum: Nematoda, Species: Trichinella spiralis

Common Name: Trichina worm

Infection vector: eating encysted juveniles in raw/poorly cooked pork and bear.

Causes disease when intestinal juveniles migrate to voluntary muscles from lymphatic and blood vessels.

Phylum: Nematoda, Species: Wuchereria bancrofti

Causes elephantiasis. Huge swelling and deformation of male genitals and limbs.

Microfilaria (juvenile form) live in human blood stream; adults live in lymph vessels, especially male genital organs and arms and legs.

Transmission vector: mosquitoes

Phylum: Rotifera

Very common in Wisconsin ponds and slow-moving streams.

Phylum: Nematomorpha

Common Name:l horsehair worm

Typically parasitize insects.

Phylum: Gastrotricha

Found in freshwater.

Phylum: Mollusca, Class: Gastropoda

Common name: Snails, whelks, slugs.

Genus: Mollusca, Class: Bivalvia

Species: bivalves (clams, muscles, oysters, etc)

Phylum: Mollusca, Class: Cephalopoda

Species: squid, octopus, cuttlefish, nautilus

Phylum: Mollusca, Class: Amphineura (nerve on both sides)

Common name of class members: Chitons

Phylum: Mollusca, Class: Scaphopoda (trough/boat foot)

Common name of class members: elephant tusk shells or tooth shells.

Shell: absent in octopus, pen (internal structure) for squid

Tentacles: Squid have 10, octopods have 8

Squid anatomy

Know: mantle, pen (internal shell), siphons, tentacles

Know: hinge, umbo, mantle, anterior and posterior adductor muscles, gills, heart, kidney, mouth, stomach, intestine, digestive gland, gonad, labial palps.