1. Chordata Daniel Micheli Sahil Kazmi Shannon De Peralta Period 1 Mammals http://artfiles.art.com/images/-/James-Himsworth/Animals- II-Print-C10069671.jpeg

2. Reproduction/Sample Animals Prototheria: composed of egg laying mammals. Platypus, echidna Marsupials: young are born tiny and immature and must climb into the mother’s pouch where they grab hold of a teat and do not leave until they are mature. Kangaroos, koalas, wombats, possums Eutheria: composed of all the placental mammals, whose young form as embryos in the mother’s stomach. Dogs, bats, whales, elephants, squirrels, manatees, cows, humans http://www.lelandswallpaper.com/images/bigbord1208.jp g http://thumbs.dreamstime.com/thumb_271/1211275113420yp4.jpg Daniel Micheli

3. Body Cavity: Coelum - a fluid filled cavity formed within the mesoderm. Body Symmetry: Bilateral symmetry- Symmetrical arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves. Bilateral symmetry is a characteristic of animals that are capable of moving freely through their environments http://universe-review.ca/I10-82-cavity4.jpg http://evolution.berkeley.edu/evolibrary/images/symmetrydiagram.gif Daniel Micheli

4. Central Nervous System: Brain (cerebrum, cerebellum), spinal cord Circulatory System: Four Chambered Heart http://scienceblogs.com/clock/upload/ 2006/06/nervous%20system.jpg http://universe-review.ca/I10-82-circulatory.jpg Sahil Kazmi

5. Digestive System: Mouth, pharynx, esophagus, stomach, intestine, anus. Excretory System: Mammals have kidneys, ureter, bladder, and urethra for waste regulation in the body. http://img.tfd.com/mgh/ceb/thumb/Human-digestive-system.jpg http://blog.lib.umn.edu/trite001/studyinghumananatomy andphysiology/f27-1al_urinary_system__c.jpg Sahil Kazmi

6. Locomotion and musculature: Alternate contractions of muscles for backward and forward movement. Limbs Tails Wings Skeletal Type: Endoskeleton with matrix of calcium phosphate. Most mammals have 7 cervical vertebrae. http://www.cnr.vt.edu/fisheries/afs/fisheries_techniques/Chapter14/Black%20grub%20in%20the%20fin%20of%20a%20fish.jpg http://www.earthlife.net/inverts/i mages/others/vertebrates.jpg Shannon De Peralta

7. Sensory Structures: very highly developed and specialized organs that are an extension of the central nervous system, with a sole function to take in information and relate it to the brain. Include eyes, nose, mouth, etc. Gas Exchange: Mammals inhale oxygen, exhale carbon dioxide; fish and amphibians use gills http://www.biologycorner.com/resources/fish_gills.jpg http://3.bp.blogspot.com/_mD3jinJ3a1k/SKr2cA4isWI/AAAAAAAA BAc/1g0LfsTXgKs/s400/5-senses.jpg Shannon De Peralta

8. Unique Features/Other Info. Mammals all possess teeth. There are over 5,400 species of Mammals. All Mammals have sweat glands. All living mammals use two bones for hearing. Mammalian brains have a neocortex, a region of the brain exclusive to mammals.

9. Which of the following phyla contains all vertebrates? Porifera Mollusca Anthropoda Chordata

10. Answer: Chordata

11. Which of the following phyla contains organisms with bilateral symmetry? Cnidaria Porifera Monogeneans Chordata

12. Answer: Chordata

13. Members of which of the following phyla use wings, fins and limbs for locomotion? Chordata Platyhelminthes Nematoda Mollusca

14. Answer: Chordata

15. To what phylum do humans belong? Echinodermata Chordata Annelida Cnedaria

16. Answer: Chordata