Bio1AL_Sum09_lab9_review

Bio1AL_Sum09_lab9_review - A57 Summer 2009 STUDENT REVIEW...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A57 Summer 2009 STUDENT REVIEW SHEET INVERT I PHYLUM CNIDARIANS: please examine the demos A) Hydra 1) external structures: polyp, medusa, ectoderm, tentacles, mouth, cnidocytes containing nematocysts, body, basal disk, buds, testis, ovary (some species are hermaphroditic or monoecious (one house for both sexes) while others are dioecious (two houses for both sexes). 2) internal structures (longitudinal section): gastrovascular cavity, cnidocytes containing nematocysts, endoderm (gastrodermis), mesoglea, food vacuoles. PHYLUM PLATYHELMINTHES: please examine the demos A) Dugesia 1) external structures: ectoderm (ciliated epidermis), cephalization, pharynx, pharyngeal cavity, mouth, eye spots, feeding behavior. 2) internal structures: 3 germ layers, ectoderm, mesoderm & endoderm, cephalization (nerve cords), no coelom, digestive tract, digestive epithelium, PHYLUM ANNELIDA: please examine the demos A) Lumbricus 1) external structures: evidence of metamerism = segmentation, setae, mouth, anus, dorsal blood vessel, clitellum. 1) external structures: evidence of metamerism = segmentation, setae, mouth, anus, dorsal blood vessel, clitellum....
View Full Document

Ask a homework question - tutors are online