Vertebrates /ˈvɜːrtᵻbrᵻts/ comprise all species of animals within the
subphylum Vertebrata ... The vertebrates traditionally include the hagfish, which
do not have proper ...
These include fish, amphibians, reptiles, birds, and mammals. ... The primary
feature shared by all vertebrates is the vertebral column, or backbone.
Characteristics common to all vertebrates include bilateral symmetry, two pairs of
... The 12 features that define vertebrates look different in various species but ...
Birds and mammals share about 5% of the same genes for cell structure and ...
From the classification above it is clear that birds and mammals share many
features. ... so do some groups of almost all kinds of vertebrate and invertebrate
animals. ... of birds are so different that they could not have a common
As chordates, vertebrates have the same common features: a notochord, ... As
chordates, all vertebrates have a similar anatomy and morphology with the ...
Vertebrates include the amphibians, reptiles, mammals, and birds, as well as the
Animals in the phylum Chordata share four key features: a notochord, a dorsal
hollow nerve ... In chordates, four common features appear at some point during
... stage of all chordates and also in the adult stage of some chordate species. ...
part of the chordate central nervous system, vertebrates do not have a notochord
Vertebrates, among all species of animals in the world, have the best fossil
record. ... In contrast, the best fossil record among the vertebrates exists among
the large mammals, whose bones are ... In general this group shares the
common characteristics of: ... fleshy lobed fins so that fin rays do not articulate
directly to girdles.
Many of the most important and diagnostic mammalian characteristics serve to
further ... Skin glands: Mammalian skin contains several kinds of glands not found
in other vertebrates. ..... do humans; Multiple births - primates don't usually, but
more primitive groups do ... All share a series of distinctive morphological
Birds & Mammals. Birds are vertebrates of the class Aves. There are ... But
whether they live on land or water, all mammals share some common
All mammals have three middle ear bones, commonly called the hammer, anvil
and stirrup. ... Mammals are known to have determinate growth, but so do birds,
and at least the American alligator. ... Bayous are common homes for gator gars.