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Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
Mammals elisa
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Mammals elisa


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  • 1. Mammals By Elena, Ell, Elisa 10/2
  • 2. Mammals
    • Scientific name: Mammalia
    • Bilateral symmetry
    • Most closely related to primates, which include monkeys, apes, and lemurs. 
    • Rates of chromosomal change - can vary from 1 to 10 rearrangements per million years
    • On the basis of these rates we would expect 84 to 600 conserved segments in a chicken in comparison with human or mouse .
  • 3. Derived Characteristics
    • Hair -no other organisms possess true hair and all mammals have hair covering at least part of their body at some time during their life.
    • Mammary glands - uniquely mammalian trait; consist of ducts and glandular tissues that secrete milk through nipples.
    • Three middle ear -t he middle ear bones transmit sound vibrations from the tympanic membrane or eardrum to the inner ear and transforms them into neural impulses
    • Single bone comprising their lower jaw - in all other animals, more than one bone comprises the jaw
  • 4. Reproduction
    • 3 types of reproduction:
    • Monotreme reproduction -laying eggs (platypus and echidna)
    • Marsupial reproduction -give birth to live, tiny underdeveloped offspring that continue their development inside the mother’s pouch (kangaroo)
    • Placental reproduction -prolonged gestation in which the embryo remains in the uterus to develop fully, receiving nourishment from the mother via the placenta
  • 5. Life Cycle
      • Mating - the male inserts the male sex organ into an opening in the female and the mating process begins.
      • Meiosi s- the two cells, or gametes, combine; this new life is known at this point as the zygote, or the combined egg and sperm.
      • Gestation - the point from when the zygote is formed until the baby is developed birthed
      • Birth - Females give birth to the infants
      • Young mammals - simply grow into larger versions of themselves at birth, until they are at an adult age and growth stopping point of maturity.
  • 6. Digestion
    • Oral cavity - sensation of food in the oral cavity sends a reflex that activates the salivary glands that deliver saliva through ducts to the oral cavity
    • Pharyn x- when swallowing, the top of the trachea is closed off by the cartilaginous flap, called the epiglottis.
    • Esophagus - The esophagus moves food from the pharynx down to the stomach
    • Stomach - secretes gastric juice and all of the bacteria are killed. Also located in the gastric juice is pepsin, which is an enzyme that hydrolyzes proteins. The pepsin only breaks the peptide bonds adjacent to specific amino acids.
    • Small intestine - digestion takes place
    • Large intestine- reabsorbs water that has entered the alimentary canal. The final phase of the digestive system is when the feces reach the terminal part of the colon called the rectum. This is where the feces are stored until they are eliminated.
  • 7. Cheetah -the world’s fastest animal
    • Order: Carnivora (250 species of mammals in 8 families)
    • Class: Mammals (Mammalia)
    • Family: Felidae
    • Name: cheetah (means spotted one, from Hindu)
    • Scientific name: Acinonyx (means ‘non-moving claws’ genus) jubatus (means ‘maned’ (cheetah’s mantel) species)
  • 8. Opossum
  • 9. Black Bear
  • 10. Cheetah
  • 11. Work Cited
    • &quot;Carnivores - Order Carnivora.&quot; Free Website Hosting Angelfire Free Website Templates to Make Your Own Free Website . Web. 29 Mar. 2010. <>.
    • &quot;Cheetah Facts.&quot; Out to Africa Op Safari Door Afrika . Web. 29 Mar. 2010. <>.
    • &quot;The Life Cycle of Mammals |; EHow | How To Do Just About Everything! | How To Videos & Articles . Web. 29 Mar. 2010. <>.
    • &quot;Mammal Characteristics - Nine Characteristics of Mammals.&quot; Animals Wildlife - Animal Facts, Animal Pictures, Habitat Facts, Evolution and Zoology . Web. 29 Mar. 2010. <>.
    • &quot;Mammalian Reproduction and Offspring Care: The Sexual Reproduction of , Monotremes and Marsupials.&quot; Mammals . Web. 29 Mar. 2010. <>.
    • &quot;Reproduction in Mammals.&quot; The Earth Life Web . Web. 29 Mar. 2010. <>.
    • &quot;Virginia Opossum Printout-; ENCHANTED LEARNING HOME PAGE . Web. 29 Mar. 2010. <>.
    • &quot;WikiAnswers - What Is Cheetah's Locomotion.&quot; WikiAnswers - The Q&A Wiki . Web. 29 Mar. 2010. <>.