Eumetazoa Bilateria triploblastic 36 Phylum Platyhelminthes Flatworms 37

Eumetazoa: Bilateria triploblastic 36

Phylum Platyhelminthes Flatworms 37

Parenchyma tissue Parenchyma Functions: “Skeletal support, nutrient storage, motility, reserves of regenerative cells, transport of materials, interactions between tissues, oxygen storage, perhaps other…” Conn 1993. The biology of flatworms (Platyhelminthes): parenchyma cells and extracellular matrices 38

Phylum Platyhelminthes Class Turbellaria: Turbellarians • First of four classes of flatworms • Freshwater, marine, and terrestrial • Glide across substrate using rows of cilia along ventral surface (see cross section below) • Many possess eyespots • Often toxic (hence bright colors) 39

Regeneration 40

Examples of Marine Flatworms https: //www. youtube. com/wa tch? v=wn 3 xlu. IRh 1 Y&app=d esktop 41

Freshwater & Terrestrial 42

Phylum Platyhelminthes Class Trematoda: Flukes https: //www. youtube. com/watch? v =fq. UV_FFTQa 8 43

Female Male Schistosoma 44

Swimmer’s Itch (cercarial dermatitis) 45

Phylum Platyhelminthes Class Cestoda: Tapeworms 46

Proglottid Reproduction Sally Mae Wallace on September 05, 1991 47

Tapeworm being removed from patents mouth 48

Phylum Nemertea Ribbon Worms https: //www. youtube. com/watch? v=2 cj. Mn 7 A c. Cq 4&ebc=ANy. Px. Kp. Do 1 w. EL 8 O_Ep 4 Uuow 2 Qx. Bg. KChw 38 fkzso. L 4 Gx. YP 3 UPybcdvdmve 5 Vxi. W_0 Zifr. EXU 4 hc o. YNi 9 lh. T 1 li 2 ztl 5 NU 8 lr. A http: //www. yout ube. com/watch? v =q. T 2 x 9 Yuowq. U Copyright © Mc. Graw-Hill Companies Permission required for reproduction or display 49

Phylum Nematoda Roundworms Arthropoda Mollusca Chordata Platyhelminthes Nematoda Annelida Porifera Echinodermata Other protozoans Apicomplexa Ciliophora 50

Nematode Anatomy 51

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Other Nematode Parasites https: //www. youtu be. com/watch? v=P r. Ulhuf. Wl. IA 53

Filarial Nematodes Matchstick Worm (Dracunculus) Wuchereria bancrofti (elephantiasis) Loa loa (eye worm) Onchocerca volvulus (river blindness) https: //www. youtube. c om/watch? v=ph. Cod 0 tfk. E 54