Mammals Presentation

Created By:

Emi BuchinskaYanko Hristov

Nona Stancheva

How can we recognize a mammal? Produces milk for its children (if the animal is female)

Has hair – all even dolphins and whales – because of their mustache

Lower jaw – consists only of a single jaw Has 3 bones in the ears – stapes, incus, malleus (they were once

a part of the jaw, but during evolution period – became parts of the ears)

Has only one main artery that curves to the left side of the heart and becoming aortic arch

Has diaphragm (muscle+tendon that separates the body in 2 parts)[2]

What does the word mammal mean? (Word Origin)

Mammalia/mammalis (in Latin) – comes from the word mamma – meaning

mother[6]

Symmetry 3 kinds of symmetries – – radial, asymmetrical &

bilateral Mammals – bilateral - if we cut the animal in the middle

of its body the 2 parts are going to be almost the same

looking – symmetrical body

Naming mammals! Kingdom - Animalia Phylum – Chordata Subphylum – Vertebrata Class - Mammalia Subclass - Prototheria;

Metatheria; Eutheria

Dolphins/Delphinus (by Yanko!)

Live in seas, oceans, rivers (in ¾ of the seas in the world) Different food (mostly small fish) – big dolphins need 10-15kg Quickest – 35km/h Adult Dolphins Reproduction Baby Dolphins Interactions with humans [8]

Foxes/Fukh Europe, Asia, North and South America Mostly in the forests Have some kind of a diet – different food to function well Almost invisible – very quick! 35-40 inches long Winter Mating Season; Autumn Dispersal Season; Spring Moult

and Birth Season; Summer Area Spreading [7]

Bats/Chiroptera in all continents in the world (in the forests, also in caves) Most eat insects some eat mice and other animals with the size of a mouse can’t function properly during the daylight Adult ( 1 year bat) Baby Bat ( Can’t stand alone) Baby Bat (Can

Stand) Teen Bat ( Can Fly) Rabies – disease able to cause heart attack, coming from bats [9]

Reproduction in mammals - internal fertilization- embryo develops inside the

mother’s body - smaller animals- shorter gestation, larger

animals- longer gestation - 3 phases of gestation: 1) development of the embryo 2) development of the fetus (the embryo in its

later stages of development) 3) birth of the fetus [1]

Obtaining and digestion of food - herbivores- feed on plant materials - cellulose- hard for digestion; mammals

lack specialized enzymes - digestion takes place with the help of

microbes; cellulose is broken down in the internal flora

- carnivores - can go for several days without food -omnivores [4] , [3]

Movement - mammals are capable of walking big distances - homeothermic body (warm blood) - when running/walking, legs move back and forth

beneath the body - movement is possible because of tendons - the back stores energy - different types of movement

(walking/running/flying/swimming/jumping/crawling, etc.) [3]

Vocabulary Abundant – Common , Rich, Have a lot of Rabies – A disease which can cause heart attacks Herding – Hunting by a whole group surrounding the victims Moult – change of feathers Bilateral – symmetrical Asymmetrical – opposite to bilateral Radial – in a round shape Viviparous- giving birth to living offsprings Gestation- pregnancy Fetus- the embryo in its later stages of development, right before it

is born Homeothermic- having warm blood

Works Cited1. "The Open Door Web Site : Biology : Reproduction in Mammals." The Open Door

Web Site : Home Page. Web. 23 Mar. 2010. <http://www.saburchill.com/chapters/chap0037.html>.

2. "Estonian Vertebrates - The General Characterization of Mammals." Loodusteadusliku Hariduse Keskuse. Web. 23 Mar. 2010. <http://bio.edu.ee/animals/Imetajad/imalgus.htm>.

3. "Diet and Digestion in Mammals." The Earth Life Web. Web. 23 Mar. 2010. <http://www.earthlife.net/mammals/diet.html>.

4. "Animal Digestion." KIDCYBER. Web. 23 Mar. 2010. <http://www.kidcyber.com.au/topics/anidigestion.htm>.

5. "Locomotion in Mammals." The Earth Life Web. Web. 23 Mar. 2010. <http://www.earthlife.net/mammals/locomotion.html>.

6. http://www.etymonline.com/7. http://animaldiversity.ummz.umich.edu/site/accounts/pictures/Vulpes_vulpes.html8. http://earthtrust.org/wlcurric/dolphins.html9. http://www.bats4kids.org/10. Biology textbook