1. Mader's Concepts in Biology, First Edition Copyright©The McGraw-Hill Companies, InC) Permission required for reproduction or display. Sylvia S. Mader Chapter 26…

1. Reflex Arc LabData: 2. Data Analysis1. Compare the reaction times for voluntary vs. involuntary activation of the quadriceps muscle. What might account for the observed…

1. System of specialized cells (neurons, or nerve cells) that conduct stimuli from a sensory receptor through a neuron network to the site (e.g., a gland or muscle) where…

Slide 1 Flatworms or Who Got Run Over by the Mail Truck Slide 2 I. General Traits or Characteristics A. Simplest animal that possesses bilateral symmetry Slide 3 B. Bilateral…

VS. Flatworms demonstrate a bilaterally symmetrical body plan They are dorsoventrally flattened and lack a skeleton They have a highly branched gastrovascular cavity . There…

Animals have different patterns of symmetry, the arrangement of body parts around a central axis Asymmetry â no general body plan Example: Sponges Asymmetry Radial symmetry…

Flatworms Phylum: PLATYHELMINTHES Flatworms Phylum: PLATYHELMINTHES VS. Class Turbellaria includes: Planarians 3 Class Cestoda Includes: Tapeworms Class Trematoda Includes:…

Introduction to Phylum Platyhelminthes Introduction to Phylum Platyhelminthes Flatworms Phylum Platyhelminthes There are hundreds of species of flatworms that have been identified…

Slide 1 Invertebrates: Platyhelminthes & Nematoda Barbara Leary and Amy Vallis AP Biology 8 April 2011 Platyhelminthes and Nematoda BOTH exhibit bilateral symmetry (right…

Introduction to Phylum Platyhelminthes Introduction to Phylum Platyhelminthes Flatworms Phylum Platyhelminthes There are hundreds of species of flatworms that have been identified…