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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.
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Acoelomate flatworm Pseudocoelomate roundworm Coelomate Leech
Tapeworm • Uterine branches in proglottid
Class Trematoda- Flukes Clonorchissinensis - liver fluke Oral sucker Pharynx Intestines (cecum) Uterus Testes
Blood FlukeSchistosoma Male Female
Pinworm Female
Pinworm adult Mouth Pharynx Eggs
Phylum Nematoda roundworms Ascarislumbricoides - intestinal round worm- (plastimount) Male Female
Hookworm teeth Necator americanus
Posterior bursa and rays of Male Hookworm Rays 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 Trichinellaspiralis- threadworm encysted in muscle Cyst Muscle Larva
Trichinellacysts Muscle Larvae Cyst
Dermacentor spp.- tick Head Thorax Abdomen Legs Class Arachnia
Sarcoptesscabiei - 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 Pediculushumaniscorporus - human body louse Abdomen Thorax Head Antennae (for feeling) Eyes Plates (protection) Legs