HHS HBio

Placentals

Mamalia Eutheria - Placentals/Placental Mammals

Distinguishing Features: Mammals that give birth to live young, and the fetus develops in the mother's uterus. The placenta nourishes the fetus until it is born.

Placental mammals differ from marsupials in that the placentae of marsupials does not last as long nor is as significant to the nourishment of the fetus.

Examples: Armadillo, Whales, Humans

Kelsey Smith, Erika Smith, Sammie Westelman

Placental Mammals

Mamalia Eutheria - Placentals/Placental Mammals

Distinguishing Features: Mammals that give birth to live young, and the fetus develops in the mother's uterus. The placenta nourishes the fetus until it is born.

Placental mammals differ from marsupials in that the placentae of marsupials does not last as long nor is as significant to the nourishment of the fetus.

Examples: Armadillo, Whales, Humans

http://embryology.med.unsw.edu.au/Notes/images/placenta/plMembraneW450.jpg

Kelsey Smith, Erika Smith, Sammie Westelman

Bony fish are a class in the phylum group chordata. They have rather bony skeletons rather than cartilaginous skeletons. They are the largest class of vertebrates in existence today. All bony fish posses gills as their sole or main means of respiration. Bone fishes are primitively cold blooded. Bony fish are covered in overlapping scales across their bodies. They also can see in color.

Re: Marsupials

our information source was http://en.wikipedia.org/wiki/Marsupial

On Thu, May 30, 2013 at 9:32 AM, Spinella, Megan <megan.spinella@hanovernorwichschools.org> wrote:

Sources: Image- http://animals.nationalgeographic.com/animals/mammals/gray-kangaroo/
Information-

Marsupials are of the mamalia class within the phylum of Chordata. This means they share the mamalian characteristics of being endothermic, having three middle ear bones and having mammary glands. What distinguishes marsupials from other mammals is that they give birth to undeveloped young and carry them in their pouch which contains multiple nipples and provides protection and sustenance for the young. Other characteristics are marsupials' ossified patellae are not present, the epipubic bones are present, and they have a gross lack of communication between the right and left hemispheres of their brain.

Common examples are kangaroos, koalas, and possums.

Marsupials

Sources: Image- http://animals.nationalgeographic.com/animals/mammals/gray-kangaroo/

Information-

Marsupials are of the mamalia class within the phylum of Chordata. This means they share the mamalian characteristics of being endothermic, having three middle ear bones and having mammary glands. What distinguishes marsupials from other mammals is that they give birth to undeveloped young and carry them in their pouch which contains multiple nipples and provides protection and sustenance for the young. Other characteristics are marsupials' ossified patellae are not present, the epipubic bones are present, and they have a gross lack of communication between the right and left hemispheres of their brain.

Common examples are kangaroos, koalas, and possums.

Mamalia: Monotremes

Monotremes are mammals that lay eggs rather than giving birth to their offspring. "Monotreme" literally means "single hole," which refers to the cloaca. Monotremes have less developed thermoregulation than other mammals. Examples include platypuses and echidnas, which means "spiny anteater."

http://en.m.wikipedia.org/wiki/File:Tachyglossus_aculeatus_side_on.jpg

Amphibian--both life

Live in terrestrial, fossorial, arboreal, or fresh water ecosystem.
Require water for reproduction
Go through metamorphosis
Cold blooded
Examples: frog, salamander, road, newt