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Bio 1306 Week 9 Notes

by: Kimberly Rodriguez

Bio 1306 Week 9 Notes Bio 1306

Kimberly Rodriguez
GPA 4.0

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About this Document

The notes are from 4/11/2016.
Organismal Biology
Class Notes
Science, Biology, Organismal Biology, bio1306
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This 2 page Class Notes was uploaded by Kimberly Rodriguez on Tuesday April 19, 2016. The Class Notes belongs to Bio 1306 at University of Texas at El Paso taught by in Spring 2016. Since its upload, it has received 7 views. For similar materials see Organismal Biology in Science at University of Texas at El Paso.

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Date Created: 04/19/16
Organismal Biology Dr. Carl S. Liebe Week 9 Notes Annelida Have a segmented body plan. Inside, they have a complete digestive system and closed circulatory system. Their excretory system is based on nephridia (organs in each segment that discharge and empty it to the outside). They also have a typhlosole—a fold that increases absorptive surface area. They also have a pharynx, crop, and a gizzard for grinding food. Hermaphroditic and oviparous. Includes sandworms, earthworms and leeches. Mollusca  Foot: for locomotion  Visceral mass: holds internal organs  Mantle: used for gas exchange and excretion  Mantle Cavity: space between shell and mantle. Place where water or air gets in or out.  Bivalves, clams, mussels Have a shell with 2 halves and an open circulatory system.  Gastropods Torsion gives the shell its spiral. They have a radula for feeding and an open circulatory system. (snails/slugs)  Cephalopods Octopus, squid, cuttlefish, nautilus. Have a closed circulatory system a well-developed nervous system and are considered the most intelligent. Ecdysozoans Animals that perform the molting of their exoskeleton.  Horsehair worm Long and thin. They are parasitic in roaches/crickets.  Nematoda Have a waxy covering (cuticle), a complete digestive system, (roundworm) pseudocoelom—fluid-filled cavity lying inside the external body wall of the nematode that bathes the internal organs— and are gonochoristic.  Onychophorans Not intermediate between annelids and arthropods anymore. Organismal Biology Dr. Carl S. Liebe Week 9 Notes  Tardigrada “Water bears” that live in water films or cover mosses.  Arthropoda Have an exoskeleton made of chitin and an open circulatory system. Ancestral arthropods had biramous appendages. The upper was used for gas exchange and the lower was used for locomotion. -Insects: Have tracheae: tubes that bring in oxygen and openings to the outside (spiracles) Also have malphigian tubules: excretory tubules that collect waste and empty it. Insects can also have a complete metamorphosis (with a larval, pupa, and adult stage) or incomplete metamorphosis. Deuterostomes Means second mouth. Includes Echinoderms and Chordates.  Echonodermata Five-part radially symmetrical. They have a water-vascular system that allows locomotion.


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