Content Outline for Teaching - Potosi School District - Home
Content Outline for Teaching - Potosi School District - Home
Content Outline for Teaching - Potosi School District - Home
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18<br />
<strong>Content</strong> <strong>Outline</strong><br />
<strong>for</strong> <strong>Teaching</strong><br />
Vertebrate Animals<br />
Underlined words and<br />
phrases are to be filled<br />
in by students on the<br />
Note-taking Worksheet.<br />
Section 4<br />
Mammals<br />
A. Characteristics—endothermic vertebrates with mammary glands and hair<br />
1. Mammary glands—produce milk that is used to nourish young<br />
2. Specialized teeth<br />
a. Herbivores—plant-eating animals with incisors that cut and flat molars that<br />
grind<br />
b. Carnivores—meat eaters with sharp canines that tear flesh<br />
c. Omnivores—eat both plants and animals using a variety of teeth<br />
3. Body systems<br />
a. Well developed lungs with millions of alveoli<br />
b. Large brain and complex nervous system that allows them to learn and remember<br />
c. Internal fertilization<br />
B. Mammal types<br />
1. Monotremes lay eggs and lack nipples on mammary glands.<br />
2. Marsupials give birth to immature young that finish developing in a pouch.<br />
3. Placentals develop from embryos connected to a placenta by an umbilical cord.<br />
a. Placenta provides food and oxygen to embryo and removes the embryo’s wastes.<br />
b. Time of development in uterus is called gestation period.<br />
C. Mammals today<br />
1. More than 4,000 species exist.<br />
2. Found on every continent and climate<br />
3. Have a role in maintaining environmental balance<br />
4. Many mammals are endangered due to destruction of their habitat.<br />
Discussion Question<br />
What does a mammal’s teeth reveal about it? Its diet<br />
Vertebrate Animals 62
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