Bird Quiz Flashcards
How did they reduce weight and size?
Hollow bones
Fusion of bones together
Hollow bones?
Pneumatic
Loss of bone in the beak and is made with Keritin
No more teeth
Fusion of bones?
Keeps arms, legs, and neck stiff to have more energy
Reduces muscle weight
Usually fuse in the vertabrate
What types of feathers are there?
Downy
Display
Barbulos
Downy Feathers
For insulation
Have barbs on the top and calamus underneath
Display feathers?
Display for sex attraction
Rachis is up the middle with barbs on the sides (equal size) and a calamus underneath
Peacock tail
Barbulos feathers?
Rachis in the middle
Barbs on the sides (one side is longer than the other) Barbulos connect at barbs with calamus underneath
Wishbone?
Fused clavicle bones
Supercoricodious?
Coricoid acts as a pulley and lifts the wing up
Pedtoralous major?
Pectoral muscle
What two things make up 60% of a birds total mass?
Supercoridodious
Pectoralous major
Where are both supercoricodious and pectoralous major?
Muscles on the chest
What do the supercoricodious and pectoralous major do?
Makes a bird go down and forward into the wind
Airfoil?
Wing is big on the front so it squeezes the air ontop to go up more
Pushes down on the air makes more wide area to go up
What makes energy?
Life, fuel, o2
Where and why does the blood travel?
Goes to blood and muscles for less lactic acid
What kind of heat does a bird have?
4 chambered
Seperates body blood from oxygen blood
Air sacs?
Goes into bones (pneumatic bones) and gets oxygen
Why are there air sacs?
Air absorbs the heat as it passes through, away from heart and into the airsacs
What do bones act as?
Radiator to take away heat
What do birds lack?
Diaphragm
How does a bird breathe?
Fused bones by the rib cage make air go into the airsacs and pushes the old air out
What type of air is always going in?
Positive air
How is old air pushed out
New air pushes the old air into little airsacs and go out so it never mixes
Correlation between birds and eating
Need to eat fast and keep weight down
How do birds eat?
Crop is a big stretchy thing that holds food and then goes to the gizzard to shred the food in the stomach
What happens to the food in the stomach?
More acid than humans break down food and liquidizes the food
What happens in the intestines?
It passes quickly and the sesum puts bacteria back into the intestines
What is Uric acid?
Helps get rid of amonia
What is excreted?
Uric acid crystals combines with diarria and is excreted
Perching tendon?
When perching on a branch, it transfers it’s weight so that when it lands, it’s claw closes automatcially
It also clasps onto its food at 100 mph and its tendon closes on it
On back of leg and under the claws
What was the main thing to transition from dinosaurs to birds?
Reduced size and weight
