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Birds 31-2

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by

Katelynn Dorn

on 7 April 2015

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Transcript of Birds 31-2

Birds 31-2
Circulation/Excretion
4 chambers, 2 loops
O2 poor from body to lungs, O2 rich blood from lungs back into heart to body
nitrogenous wastes from blood to kidneys, converted and stored
white uric acid crystals remain
Movement
enlarged chest muscles to empower wings, hollow bones
birds rotate wings like oars
sternum and keel
airfoil wing shape- air pressure below wing > air pressure above wing
Diversity in Birds
Pelicans & Relatives
Birds of Prey
Parrots
Cavity-Nesting Birds
Perching Birds
Herons & Relatives
Ostriches & Relatives
Ecology of Birds
Hummingbirds- pollinators
Swallows and Chimney Swifts- mosquitos
Migration- use stars, landmarks, magnetic field
indicators of environmental health
Feeding
Birds need to eat a lot for their metabolism to generate heat energy
crop- stores and moistens food
can produce a substance rich in protein and fat
gizzard- uses muscles and gravel to crush food
cloaca
Body Temperature control
endotherms- have high rate of metabolism
feathers allow insulation to conserve metabolic energy
Respiration
air -> air sacs -> lungs filled with small tubes
helps birds fly at high altitudes where air is thin

Response/Reproduction
cerebrum- flying, nest building, care of young, courtship, mating
cerebellum, medulla oblongata, optic lobes, olfactory bulbs
internal fertilization
birds' reproductive organs shrink when not breeding
amniotic eggs with hard shells
Full transcript