10. Chp 33 – Rise of the Mammals
• Definition of a Mammal:
1. Homoeothermic – meaning that mammals
produce their own body heat
2. Mammary tissue - for the production of Milk
3. Hair Follicles - for the production of Hair
4. Generally, internal fertilization and harboring
of young, however, this is only a generality
because not all young are “cooked” to term
internally.
11. Monotremes – an Order of Class
Mammalia
Monotremes
eg. The Platypus, which has a BILL, lays EGGS, but still has
mammary glands and produces MILK for young. This
suggests a relationship between REPTILES, BIRDS and
mammals. Imagine that?
12. Marsupials
– eg. The Kangaroo, which is a non-placental mammal.
Here, the development of the young is very
complex, and a baby kangaroo is born very
“uncooked”, and must crawl into the mother’s
pouch and latch onto a nipple to receive milk to
continue development. You might say, baby
Kangaroos or “Joey’s” get a womb with a view
25. Lastly, we can Learn Important
Lessons from Mammals like Homer
26.
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