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Biology 1104k Notes: Invertebrates/Vertebrates

by: Logan Barnes

Biology 1104k Notes: Invertebrates/Vertebrates Bio 1104k

Marketplace > Georgia State University > Biology > Bio 1104k > Biology 1104k Notes Invertebrates Vertebrates
Logan Barnes
GPA 4.19

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About this Document

Notes covering Invertebrates and vertebrates
Introductory Biology II
Dr. Chapman
Class Notes
Biology1104k, Biology, invertebrates, Vertebrates, animals
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This 3 page Class Notes was uploaded by Logan Barnes on Tuesday March 1, 2016. The Class Notes belongs to Bio 1104k at Georgia State University taught by Dr. Chapman in Spring 2016. Since its upload, it has received 18 views. For similar materials see Introductory Biology II in Biology at Georgia State University.


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Date Created: 03/01/16
Invertebrates—Ch. 23 Annelids  Segmented Worms: earthworms, marine worms, leeches  Organ system level  Bilateral Symmetry  3 Germ layers—triploblastic  Protostome  Eucoelemates  Closed circulatory system – which means? o Closed= Blood is always in vessels, have a heart o Open=Have a heart, but vessels dump blood into an open cavity called hemocoel, which bathes the organs  No respiratory system, they simply use diffusion through their thin skin  Nervous system consists of o Clusters of ganglia in the head (brain) o Paired segmental ganglia o Paired ventral nerve cords  Reproduction—Sexual  Annelids fall into 3 subgroups o Oligochaetes o Polychaetes o Leeches Mollusca  Muscles, Clams, Oysters, Scallops, snails…  Organ system  Bilateral symmetry  3 germ layers—triploblastic  Protostome  Eucoelomate  Have a mantle—secretes a shell  Most have an open circulatory system o Blood percolates through a hemocoel (blood cavity) bathing internal organs directly o Cephalopods don’t have open circ. system  Nervous system is similar to that of annelids o ganglia connected by ventral nerves o More of the ganglia are concentrated in the head  Reparatory system—gills  Types of mollusks: o Bivalves (2 shells) o Gastropods (stomach foot)—snails/slugs o Cephalopods (head foot)—Octopus, etc Arthropods  Very abundant, diverse  Crabs, spiders, insects, etc  Organ system  Bilateral symmetry  3 germ layers  protostome  eucoloemate  Jointed appendages  Have specialized structure: Exoskeleton/protective layer o Prevents drying out and protects from predators o But exoskeletons can be really fuckin heavy o And you have to molt  Very efficient gas exchange o Terrestrial arthropods have either:  Tracheae (singular, trachea) – network of narrow, branching respiratory tubes  Book lungs (arachnids)  Most have an open circulatory system  Complex nervous system  Phylum Arthoropoda includes the groups: o Insects—most abundant and diverse o Arachnids o Myriopods o Crustaceans  Reproduction—sexual Nematoda  Roundworm  Organ system  Bilateral  3 germ layers—triploblastic  protostome  pseudocoloemate Vertebrate Chordata Bony fish: found in nearly every watery habitat o Include 2 major groups o Ray fined fish and lobe finned Amphibians o Both land and water o Larvae/egg starts in water Major characteristics: o 4 Limbs o Double life cycle o Breathe through lungs and thin skin Reptiles and birds o Reptiles: fully adapted to life on land  Shelled Amniotic egg= key feature Mammals—mammary glands, live virth, hair/fur, sebacoussweat glamds o Brain highly developed, allows learning o 3 groups of mammals  Monotremes—they lay eggs  Marsupials-- POUCHES  Placental mammals—largest group of mammals


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