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SUPREME COURT OF CANADA

These are parts that look or act similarly but evolved independently. A bird’s wing and a butterfly’s wing both allow flight, but their internal structures are completely different. This is known as convergent evolution . 3. Form Follows Function

These are parts that share a common ancestry but may look different or perform different tasks today. A classic example is the pentadactyl limb . The humerus, radius, and ulna found in a human arm are the exact same bones found in a whale’s flipper and a bat’s wing. They are "variations on a theme."

At its core, vertebrate anatomy is about patterns. All vertebrates—animals with backbones—share a common structural plan: a dorsal hollow nerve cord, a notochord, and pharyngeal slits at some stage of development.

Fish have a two-chambered heart, efficient for water-breathing. As vertebrates moved to land, hearts evolved into three chambers (amphibians/reptiles) and eventually four (mammals/birds) to keep oxygenated blood separate and support higher metabolic rates. 4. Vestigial Structures: The "Leftovers"

It reminds us that we aren't just observers of the animal kingdom—we are a branch on the same ancient tree.

Comparative Vertebrate Anatomy -

These are parts that look or act similarly but evolved independently. A bird’s wing and a butterfly’s wing both allow flight, but their internal structures are completely different. This is known as convergent evolution . 3. Form Follows Function

These are parts that share a common ancestry but may look different or perform different tasks today. A classic example is the pentadactyl limb . The humerus, radius, and ulna found in a human arm are the exact same bones found in a whale’s flipper and a bat’s wing. They are "variations on a theme." Comparative Vertebrate Anatomy

At its core, vertebrate anatomy is about patterns. All vertebrates—animals with backbones—share a common structural plan: a dorsal hollow nerve cord, a notochord, and pharyngeal slits at some stage of development. These are parts that look or act similarly

Fish have a two-chambered heart, efficient for water-breathing. As vertebrates moved to land, hearts evolved into three chambers (amphibians/reptiles) and eventually four (mammals/birds) to keep oxygenated blood separate and support higher metabolic rates. 4. Vestigial Structures: The "Leftovers" The humerus, radius, and ulna found in a

It reminds us that we aren't just observers of the animal kingdom—we are a branch on the same ancient tree.