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There are over 33,000 species of fish. What do we call a fish that has strong bones and a backbone?
Bony Fish
Which external organ does a fish use to see everything underwater?
The Eye.
What is the name of the central bone structure that makes a fish a "vertebrate"?
The Vertebrae (Backbone).
What is the "Lateral Line" used for?
It senses vibrations and movement in the water.
What are the hard, protective plates covering a fish's skin called?
Scales.
Which part of the fish's body is used for eating food?
The Mouth
Which organ is a long, coiled tube that absorbs nutrients from food?
The Intestine.
Which organ is responsible for filtering waste out of the fish's blood?
The Kidney.
Which fin is at the very back of the fish and helps push it forward?
The Caudal Fin (Tail Fin).
Which internal organ is a dark red muscle that pumps blood around the body?
The Heart.
When a fish "inhales," water flows through the mouth into which organ to get oxygen?
The Gills.
During "exhaling," what gas is released from the gill covers along with the water?
Carbon Dioxide.
What is the name of the bony cover that protects the fish's breathing organs?
The Operculum (Gill Cover).
Which organ is a white, air-filled bag that helps a fish float?
The Swim Bladder.
Which small organ near the liver contains bitter bile and must not be broken during dissection?
The Gallbladder.
Look at the image of the sick goldfish. What disease causes a fish to float upside down or sink?
Swim Bladder Disease.
How many chambers does a fish heart have?
2 chambers.
Name the two chambers found in a fish heart
Upper chamber (Atrium) and Lower chamber (Ventricle).
How is a fish heart different from a human heart?
A fish heart has 2 chambers, while a human heart has 4 chambers.
Which organ in a fish performs a similar job to the "Lungs" in humans by taking in oxygen?
The Gills.