scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,981
General Characteristics of Class Mammalia Mammals are the most evolved and adapted of the five Chordate classes They include around 5000 species placed in around 26 different orders Mammals are divided into 3 different major groups according to their embryonic development Monotremes although there are only 3 known living species eg the platypus are ovoviparous but still suckle their young from simple mammory glands Marsupials give birth to tiny embryos which attach to the mothers nipple in the marsupium eg the kangaroo Lastly Placentals give birth to young which are almost ready to survive on their own and are suckled until they leave the parent eg the Yellow baboon In mammals the middle ear bones namely the malleus incus and stapes help transform the vibration of sound into a nervous stimuli thus increasing the level and accuracy in hearing different sounds Mammals are the only Chordate class which have this feature Mammals have hair or pelage on the external dermal surface which is made up of a protein called keratin This hair serves a range of functions which includes the reduction of the exchange of heat with the environment and protects the animal against its harsh surroundings like sunrays They can also have a sensory function as in the whiskers on a cat The hairs also help the animal camouflage eg the leopard or to reveal warning signs like the skunks noticeable colour pattern serves as a warning to potential predators The patterns on the hair can also differentiate young from adults eg the Dalmatian dog Mammals may also puff out their fur making them seem larger and more intimidating to predators All mammals suckle their newborn young with milk which is rich in fats and proteins and antibodies which help the young face the world This milk is produced in the mammory glands much like modified sweat glands The mammory glands are usually situated on the ventral surface of females
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA