7.1 Designed for Flight

What is the name of the organ that grinds food?

• gizzard

• pectoral

• alula

What is the most important flight muscle?

• gizzard

• pectoral

• contour

What is the name of the sac in the esophagus that stores and moistens food?

• alula

• contour

• crop

Name the retractable group of feathers on the front of a bird's wing.

• alula

• contour

• crop

What are soft and fluffy feathers called?

• up

• down

• alula

The type of eyesight that provides hunting birds with the ability to focus both eyes on one object is monocular vision.

• true

• false-binocular

The tiny tubes that allow air to flow through a bird's lungs are called air sacs.

• true

• false-capillaries

To move each breath through the respiratory system, a bird must inhale and exhale three times.

• true

• false-two

Birds have toothless bills made of keratin.

• true

• false-sacs

Tags

NGSS.MS-LS4-2

A bird is able to waterproof its feathers with oil found in a special structure called a preen gland.

• true

• false- garland