class aves

Question 1

describe the vane in a feather

Answer 1

• supported by quill
• composed of barbs zipped together by barbules, making a tight seal
• waterproff

Question 2

where are flight feathers located?

Answer 2

On the wings

Question 3

what does a birds tail do?

Answer 3

support the bird when in flight and allow for steering

Question 4

What do contour feathers do?

Answer 4

Protect and insulate the body

Question 5

what do down feathers do?

Answer 5

Create air sacs that retain body heat, and provide in insulation

Question 6

What are on the hind legs of birds

Answer 6

scales, claws

Question 7

describe the horned beak / bill

Answer 7

• composed of keratin
• toothless

Question 8

describe their bones

Answer 8

hollow, round, reduces body weight

Question 9

why do they have rapid metabolism?

Answer 9

• endothermic
• active lifestyle

Question 10

describe their respiratory system

Answer 10

• air sacs
• advanced lungs

Question 11

describe the circulatory system

Answer 11

• 4 chambered heart
• no mixing of blood
  -hemoglobin: increases oxygen

Question 12

describe reproduction

Answer 12

females only have one ovary
- internal fertilization
- amniotic eggs

Question 13

which systems are simplified

Answer 13

reproductive, digestive, excretory

Question 14

describe the excretory system

Answer 14

no urinary bladder
- waste passes frequently from the cloacal opening shared by digestive tract

Question 15

why is it important to have 4 chambered heart

Answer 15

Chambers separate oxygenated and deoxygenated blood maximizing oxygen that is absorbed