Concept explainers
To compare: The structure of planarian and earthworm with regard to their: digestive tract, body cavity and the segmentation.
Concept introduction: The Planaria is a flatworm that is included in phylum
The Earthworm is included in phylum Annelida which is the group of animals that are included in the invertebrates. These are the true segmented worms that have flexible body and no hard skeleton is present in their body. They have closed circulatory system, small brain, nervous system and excretory system. They do not have legs. Their body cavity is filled with coelom. Their size range from 1 mm to 3 m. They are found in various habitats like in soil, at the bottom of the ocean or in fresh waters.
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Chapter 18 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
- List two or three features of an earthworm cross section that distinguish the dorsal and ventral surfaces.arrow_forwardExplain functions of each of the following in earthworms: pharynx, calciferous glands, crop, gizzard, typhlosole, chloragogen tissuearrow_forwardEarthworms are segmented animals. All of the following are present on/in most segments of an earthworm except; Vascular tissue reproductive tissue Chetae A coelomarrow_forward
- A) State the function of the following external parts of the genus Cambarus (Class Crustacea): walking legs: opening of sperm duct: gills: excretory pore: abdomen: eyes What are the hairlike appendages called that anchor into the skin of annelids? What structures do earthworms have to help dispose of nitrogenous wastes? Briefly describe how earthworms reproduce and what structures are involved.arrow_forwardIdentify the phylum/class of invertebrate that matches this description: These animals lack a complete digestive tract. Some are free living and some parasitic. Commonly known as flatworms.arrow_forwardCreate a body plan table (Insert → Add Table) for the following animal phyla: Porifera, Cnidaria, Platyhelminthes, Mollusca, Annelida, Nematoda, Arthropoda, Echinodermata, and Chordata. Describe each phylum by identifying the following body plan features. Use Lesson 12 (Chapter 32) and Lesson 13 (Chapter 33) as a guide. 1) Symmetry: Asymmetrical, Radial, or Bilateral 2) Tissue type: Parazoa, Eumetazoa (diploblastic), or Eumetazoa (triploblastic) 3) Body cavity (if triploblastic): Acoelomate, Psuedocoelomate, or Coelomate 4) Developmental mode (if Coelomate): Protostome or Dueuterostome Note: Depending on the body plan, features 3 & 4 may not apply to specific phyla. * Please answer 3) and 4) ONLY. Thank you.arrow_forward
- Compare and contrast the Phyla Porifera and Cnidaria. Think: Symmetry, Form and function, Tissue layers (present or absent, if present which are represented), Musculature/how they move, Reproduction, Nervous system and sensory structures, Respiration, Digestion (and how they feed), and comment on unique cell types found in each.arrow_forwardDescribe the digestive system of the earthworm and give the function of each structure.arrow_forwardWrite “yes” or “no” to indicate how certain features distinguish each phylum of multicellular invertebrates. Tissues Radial Bilateral symmetry Protostome development Deuterostome development Sponges Cnidarians Arthropods Nematodes Flatworms Annelids Mollusks Echinodermsarrow_forward
- Give five types of locomotion of invertebrates and describe each.arrow_forwardDescribe the following characteristics of cnidarians: common developmental stage digestive system sexuality musculature ciliationarrow_forwardWhat is the key difference between the digestive tract of earthworm and a flatworm?arrow_forward