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Mammals/ Mammalia

Mammals/ Mammalia. By Tyer Giles and Kyra Watson. Mammals are Vertebrates They also have: Hair Three middle ear bones Mammary glands that function in mothers with developing offspring They may have sweat glands and specialized teeth

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Mammals/ Mammalia

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  1. Mammals/ Mammalia By Tyer Giles and Kyra Watson

  2. Mammals are Vertebrates They also have: • Hair • Three middle ear bones • Mammary glands that function in mothers with developing offspring • They may have sweat glands and specialized teeth • Placenta, which feeds the offspring during gestation. • A brain with a neocortex Structure and Covering

  3. Mammals exchange gas through their lungs. • Mammals hearts’ have four chambers. • Mammals are endotherms. Hearts Temperature Maintenance Gas Exchange

  4. Fertilization and development occurs internally in mammals. • Development occurs in the amniotic sac. The one exception to this is platypi who lay amniotic eggs. Fertilization and Development

  5. Eutheria- deer, bears, mice, dolphins, elephants, monkeys, manatees • Metatheria- opossums, shrew, wombat, bandicoots, kangaroos • Prototheria- spiny anteaters and platypus Subgroups

  6. After several months or years mammals sex organs develop into maturity. • Female mammals are only fertile for certain periods of time, when they are said to be “In Heat”. • With particular mammals called marsupials after giving birth their joeys or offspring climb into a pouch and attaches to a teat. -They continue to receive nutrition and develop in the pouch. Other Important Parts of a Mammal’s Life Cycle

  7. http://www.enchantedlearning.com/subjects/mammals/classification/index.shtmlhttp://www.enchantedlearning.com/subjects/mammals/classification/index.shtml • http://www.ucmp.berkeley.edu/vertebrates/tetrapods/amniota.html • http://www.billcasselman.com/dictionary_of_medical_derivations/dmd_eight.htm • http://php.med.unsw.edu.au/embryology/index.php?title=2009_BGD-B_Lecture_Face_and_Ear&oldid=35150 • http://blog.coturnix.org/2010/07/27/science-blogging-networks-what-why-and-how/ • http://www.topnews.in/gene-variants-determine-lung-function-vulnerability-maternal-smoking-2144160 • http://www.puguhills.com/images/forests/black%20and%20rufous%20elephant%20shrew.JPG • http://www.newworldencyclopedia.org/entry/Life_cycle#Mammal_reproduction_and_early_life_cycle Picture and Information Sources

  8. Crustaceans and Arachnids

  9. Both Arachnids and Crustaceans are a part of the phylum arthropoda. • Arachnids class is Arachnida • Crustaceans class is Crustacea Symmetry Both crustaceans and arachnids are bilaterally symmetric. Presence or Absence of Body Cavity Arthropods do have ceolems but it is reduced. Phylum and Class

  10. Arthropods are triploblastic meaning they have three layers of germ tissue. Embryonic development of Arthropods • Arthropods are protostomes, their blastophores becomes their mouths. Body Structure and Cephalization • Both Arachnids and Crustaceans have an abdomen and a cephalothoraxes. • Generally arthropods show cephalization. Tissue Layers

  11. Digestive • They have a complete digestive tube; possess a mouth and an anus. Nervous • Anterior region of the body has a group of ganglia forming a brain. • Group of ganglia connects to ventral ganglial chains that have motor and sensory nerves. Crustaceans and Arachnids Body Structures

  12. Respiratory • Have an open respiratory system called a lacunar. • Hemolymph or blood is pumped by the heart and goes to lacunas or cavities to drain tissue and irrigate blood. Circulatory • Have hemocyanin, or respiratory pigments that carry oxygen and other gases to circulatory fluids. Crustaceans and Arachnids Body Structures (cont’d)

  13. Arachnids • Life cycle stages are egg, larvae, nymph, and spider • Nymph molt several times • During mating, male spider usually courts the female. He uses a palp covered with sperm to fertilize the female. Lifecycle

  14. Crustacean • Life cycle stages are egg, pre-larve, pre-zoea, and larval stages such as nauplius when one eye has formed, zoea when thoracic appendages are used for swimming and post-larva when abdominal appendages are used for propulsion. Lifecycle (cont’d)

  15. Arachnids Black widow spider, tarantula Crustaceans Pill bugs, shrimp Examples

  16. http://www.biology-questions-and-answers.com/phylum-arthropoda.htmlhttp://www.biology-questions-and-answers.com/phylum-arthropoda.html • http://arthropods.nhm.org/arthropods.html • http://www2.volstate.edu/msd/BIO/1020/lab4Arthropoda.htm • http://www.bio.brandeis.edu/fieldbio/arachnids_cohen_weiner/Intro.html •  http://healthyhomegardening.com/images/heidbenati/tatu2.jpg • http://islandwood.org/kids/stream_health/key/BAABBA.html • http://www.freeinfosociety.com/media/images/3952.jpg Sources for Information and Pictures

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