Note- the following slides may look different from what you saw in lab!!! These slides here are to be used in conjunction with your drawings from lab, your notes & the lab manual.

12/4/00

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Table of Contents

Note- the following slides may look different from what you saw in lab!!! These slides are to be used in conjunction with your drawings from lab, your notes & the lab manual.

Phylum Porifera

Phylum Porifera - Asconoid Type Sponge

Phylum Porifera-Asconoid Type Sponge: note spicules, spongocoel, osculum & bud [fig 1.3-A]

Phylum Porifera-Syconoid Type Sponge: note choanocytes lining spongocoel, spongocoel & osculum [fig 1.3-B]

Phylum Cnidaria-Class Hydrozoa: note cnidocyte-bearing tentacles, mouth, GVC & bud (asexual reproduction) [fig 2.2]

Phylum Cnidaria-Class Hydrozoa: Polyp with gonozooids for sexual reproduction & close-up of the gonads [fig 2.2]

Phylum Cnidaria-Class Hydrozoa: Obelia colony slide with close-up on the some of the polyps. Note polymorphism -gastrozooids (with feeding tentacles) & gonozooids [fig 2.3-6]

Phylum Cnidaria-Class Hydrozoa: ventral view of medusa stage [fig 2.3-7]

Phylum Cnidaria-Class Scyphozoa: Close-up of strobila stage, buds form from asexual reproduction [fig 2.6-E]

Phylum Cnidaria-Class Scyphozoa: Close-up of ephyra larva [fig 2.6-F]

Phylum Platyhelminthes-Class Turbellaria: note pharynx, mouth, intestine [fig 3.2-A]

Phylum Platyhelminthes- Class Turbellaria: cross section through middle of organism [fig 3.4]

Phylum Platyhelminthes- Class Turbellaria: cross section through pharyngeal region- note pharynx, gastric caeca(intestine), mesenchyme [fig 3.4]

Phylum Platyhelminthes, Class Trematoda (anterior): note oral sucker, pharynx, caeca & ventral sucker (for attachment) [fig 3.5]

Phylum Platyhelminthes- Class Trematoda: note eggs, ovaries, shell gland, caeca, uterus and testes) [fig 3.5]

Phylum Platyhelminthes- Class Cestoda: Scolex region-note rostellum & suckers for attachment [fig 3.7-A]

Phylum Platyhelminthes- Class Cestoda: mature proglottid w/ reproductive structures [fig 3.7-D]

Phylum Platyhelminthes- Class Cestoda: gravid proglottid chock full o’ eggs [close-up of fig 3.7-E]

Phylum Nemertina: cross section through anterior, note proboscis sitting in the rhynchocoel & the flattened intestine. [fig 4.3-B]

PSEUDOCOELOMATES PHYLUM NEMATODA PHYLUM ROTIFERA

Phylum Nematoda: cs through esophagus, note pseudocoel & thick cuticle [fig 5.4]

Phylum Nematoda: cross section of male, note reproductive structures, and pseudocoel [fig 5.3]

Phylum Nematoda: cs of female- note intestine, pseudocoel, “kiwi-shaped” ovaries, oviducts, & one of the 2 LARGE uteri [fig 5.3]

Phylum Rotifera: (this organism is a pseudocoelomate!!!): note corona (for feeding, locomotion & respiration), mastax, pedal glands & spurs [fig 5.5]

EUCOELOMATES PHYLUM ANNELIDA PHYLUM ARTHROPODAETC.

Phylum Annelida- Class Polychaeta: parapodium w/ setae & acicula. Parapodia are used for locomotion, sensory & respiration. [fig 6.3-A]

Phylum Annelida- Class Oligochaeta: note typhlosole (increases surface area to aide in digestion). [fig 6.8]

Phylum Annelida- Class Oligochaeta: close-up of intestine w/ typhlosole. [fig 6.8]

Phylum Annelida- Class Oligochaeta: note longitudinal & circular muscles, nephridium, and the coelom. [fig 6.8]

Author: shoplock