BS 110 Notes 11-10-2010

BS 110 Notes 11-10-2010 - BS 110 Notes 11-10-2010 7. Aves -...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BS 110 Notes 11-10-2010 7. Aves -- Continued a. Archaropteryx b. Stream lined, light body, fused bones c. Feathers –evolutionary derivatives of reptilian scales a. Flight b. Prevent water loss c. Insulation d. Homeothermic, 4 chambered heart e. Warm blooded, endothermic – are able to maintain a constant warm internal body temperature and therefore can remain active regardless of most environmental temperatures f. Definite separation of oxygenated and deoxygenated blood 8. Mammalia a. Hairy homeotherm that nourish young with milk b. Therapsids; small shrew like mammal c. Monotremes, marsupials,placentals d. Monotremes - Egg laying mammals have fur, glands that produce milk, no nipples. Ex: Duck billed platypus e. Marsupials - Pouched mammals have fur, glands that produce milk, nipples, placenta – organ where circulatory systems of young and mother are in close association and there is an exchange of materials, give birth to live young, young complete their development in external puches
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

BS 110 Notes 11-10-2010 - BS 110 Notes 11-10-2010 7. Aves -...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online