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http://gotoknow.org/blog/introbio-boatman
http://gotoknow.org/blog/introbio-boatman/264875

        Lecture capture
 

       Taxonomic category

Phylum   Chordata
  Subphylum
    Superclass
   Class    Mammalia
      Subclass
      Order    Primates
        Suborder
          Superfamily
         Family   Hominidae
           Genus    Homo
             Subgenus
             Species  Homo sapiens
           subspecies Homo sapiens sapiens

Binomial nomenclature
Trinomial nomenclature

Homo=Genus
sapiens=specific epithet
http://gotoknow.org/blog/introbio-boatman/208850

Germ layer เยื่อคัพภะ