Shark Anatomy and Adaptations

The video is a live demonstration by Gabi from the Arizona Science Center, focusing on the dissection of a dogfish shark. It covers the diversity of shark species, their anatomy, sensory systems, and adaptations. The dissection reveals the internal anatomy, including the liver, heart, and reproductive system. The video also addresses common misconceptions about sharks and highlights their ecological importance.

How many species of sharks are there worldwide?

• Over 200

• Over 300

• Over 500

• Over 400

What is the primary reason dogfish sharks are named so?

• They are friendly like dogs

• They bark like dogs

• They hunt in packs

• They have a dog-like snout

What are the small, pinprick holes near a shark's nose called?

• Lateral lines

• Denticles

• Ampullae of Lorenzini

• Nares

What adaptation allows sharks to breathe underwater?

• Lungs

• Air sacs

• Gills

• Swim bladders

What helps sharks stay buoyant in water?

• Their lightweight bones

• Their swim bladder

• Their fatty liver

• Their streamlined body

What is the function of the spiral valve in a shark's digestive system?

• To store food

• To grind food

• To expel waste

• To absorb nutrients

What is unique about the skeleton of a shark?

• It is made of cartilage

• It is made of bone

• It is made of muscle

• It is made of fat

How long can a dogfish shark's pregnancy last?

• 18 months

• 22 months

• 24 months

• 12 months

What feature helps sharks see in low-light conditions?

• Nares

• Lateral line

• Ampullae of Lorenzini

• Tapetum lucidum

What is a common misconception about sharks?

• They are not important to ecosystems

• They have poor eyesight

• They all eat large prey

• They can smell a drop of blood in the entire ocean