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10. The __ __ __ __ __ __ divides the lower portion of the heart into 2 separate ventricles. - page 2 / 3

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1.  Type of egg with 4 membranes and an outer shell = __ __ __ __ __ __ __ __

3.

Birds belong to the class called __ __ __ __

4.

In birds the kidneys filter a nitrogen waste called __ __ __ __   __ __ __ __ from the blood and send it through the ureters to the cloaca to be eliminated.

5.

A tube that carries sperm from the testes to the cloaca is called the  __ __ __deferens.

6.

Muscular lower portion of the stomach which contains small rocks to

help knead and crush food = __ __ __ __ __ __ __

7.

A bird’s heart has 2 atria and 2 __ __ __ __ __ __ __ __ __ __.

8.

Birds lose their feathers and replace them in a process called __ __ __ __ __ __ __

9.

Birds DO NOT have a urinary __ __ __ __ __ __ __ to store waste from the kidneys.

10.

The __ __ __ __ __ __at the base of the trachea produces the bird’s song.

11.

Fused collarbones that stabilize the shoulder joint during flight=__ __ __ __ __ __ __

12.

The thin skin of a bird is covered with __ __ __ __ __ __ __ __ which provide lift      during flight and preserve body heat.

13.  Feathers are made of __ __ __ __ __ __ __, the same protein found in human |         fingernails and reptile scales.

14.  A scientist who studies birds is called an __ __ __ __ __ __ __ __ __ __ __ __ __.

15.

Birds have a larger __ __ __ __ __ __ __ __ __ __ for muscle coordination during flight.

16.

In some birds like pigeons, the crop secretes a nutritious milk-like fluid

          called __ __ __ __    __ __ __ __ to feed their young.

17.

Birds have only ONE ovary and oviduct on the __ __ __ __ side of their body to make them lighter.

18.

In a bird feather the __ __ __ __ is a branch of a vane.

19.

The hard outer __ __ __ __ __ in an amniotic egg protects the embryo

         growing inside.

20.

The air sacs in birds extend into the long  __ __ __ __ __ to make them less dense.

21.

Birds have __ __ __ __ __ __ __ __ fertilization like reptiles.

22.

A bird egg is different from a turtle egg because it has __ __ __ __ __ __ __ carbonate in the shell to make it hard.

23.

Bird brains have larger __ __ __ __ __ lobes in their brain for keener vision.

24.

The forelimbs of birds have been modified into __ __ __ __ __for flight.

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