Invertebrate Photos

Acoelomate flatworm Pseudocoelomate roundworm Coelomate Leech

Tapeworm Scolex (head) with suckers and hooks

Tapeworm Segments (proglottids)

Tapeworm Uterine branches in proglottid

Tapeworms inside intestines

Class Trematoda - Flukes Clonorchis sinensis - liver fluke Oral sucker Pharynx Intestines (cecum) Uterus Testes

Clonorchis sinensis -liver fluke

Fasciolopsis buski giant intestinal fluke

Blood Fluke Schistosoma Male Female

Blood Fluke: Schistosomiais

Blood Fluke Schistosoma Swimmer’s Itch

Planaria

Pinworm Female

Pinworm adult Mouth Pharynx Eggs

Pinworm

Phylum Nematoda roundworms Ascaris lumbricoides - intestinal round worm- (plastimount) Male Female

Ascariasis

Male hookworm

Hookworm teeth Necator americanus

Posterior bursa and rays of Male Hookworm Function is for copulation

Dog and Cat Hookworms: Cutaneous Larva Migrans This is when a dog or cat hookworm gets into a human by accident. Since we are not the right kind of host, the worm dies under the skin and causes an allergic reaction.

Phylum Nematoda roundworms Trichinella spiralis- threadworm encysted in muscle Cyst Muscle Larva

Trichinella cyst

Trichinella cysts Muscle Larvae Cyst

Leech

Dermacentor spp.- tick Head Thorax Abdomen Legs Class Arachnia

Sarcoptes scabiei - itch mite Mouth Legs Bristles on rear legs Bristles on abdomen Class Arachnia

Dermatophagoides spp.- dust mite Thorax Legs Abdomen Class Arachnia

Class Insecta Flea Head Thorax Abdomen Legs

Class Insecta Pediculus humanis corporus - human body louse Abdomen Thorax Head Antennae (for feeling) Eyes Plates (protection) Legs

Human Body Louse

Crab Louse