Frog External Dissection Quiz

Observe the dorsal and ventral sides of the frog. Which of the following correctly describes the colors of the dorsal and ventral sides?

• Dorsal side is green and ventral side is white

• Dorsal side is brown and ventral side is cream or biege.

• Dorsal side is grey and ventral side is pink

• Dorsal side is black and ventral side is red

Examine the hind legs. How many toes are present on each foot? Are they webbed?

• Each foot has 3 toes, not webbed

• Each foot has 4 toes, not webbed

• Each foot has 5 toes, not webbed

• Each foot has 5 toes, webbed

Tags

NGSS.MS-LS4-2

Examine the forelegs. How many toes are present? Are the toes webbed?

• Four toes, not webbed

• Four toes, webbed

• Five toes, not webbed

• Five toes, webbed

Tags

NGSS.MS-LS4-2

Use a ruler to measure your frog from the tip of the head to the end of the frog's backbone. What is the typical length range for this type of measurement?

• 1-3 cm

• 3-5 cm

• 5-10 cm

• 10-15 cm

Locate the frog's eyes, the nictitating membrane is a clear membrane that attached to the bottom of the eye. What color is the nictitating membrane? What color is the eyeball?

• Both are clear

• Nictitating membrane is clear, eyeball is black or yellowish.

• Nictitating membrane is white, eyeball is red

• Nictitating membrane is clear, eyeball is white

Just behind the eyes on the frog's head is a circular structure called the tympanic membrane. The tympanic membrane is used for hearing. What is typically the diameter of the tympanic membrane in frogs?

• 1 cm

• 2 cm

• 3 cm

• 4 cm

Feel the frog's skin. Is it scaley or is it slimy?

• Scaley

• Slimy

Locate the tongue. Does it attach to the front or the back of the mouth?

• Front of the mouth

• Back of the mouth

• Neither

In the center of the mouth, toward the back is a single round opening, the esophagus. This tube leads to what organ?

• Liver

• Stomach

• Lungs

• Heart

Close to the angles of the jaw are two openings, one on each side. These are the Eustachian tubes. They are used to equalize pressure in the inner ear while the frog is swimming. To what structure does the Eustachian tube attach?

• Tympanic membrane

• Ear

• Nasal cavity

• Larynx