COMPARING THE HUMAN SKULL TO THAT OF OTHER VERTEBRATES: THE SPHENOID AND ETHMOID BONES

human

In humans, the sphenoid and ethmoid bones form part of the cranium. The sphenoid develops from several centers (basisphenoid, pterygoid processes, etc.) which fuse to form one bone early in life. Do other animals have sphenoid and ethmoid bones, or at least their components?

frog, salamander, and opossum skulls

frogsalamanderopossum

cat skulls

catcatcat

rhesus monkey

rhesus

WHAT SPECIFIC SIMILARITIES AND DIFFERENCES DID YOU NOTICE BETWEEN THE HUMAN STRUCTURES AND THOSE OF OTHER VERTEBRATES? HOW DO THESE STRUCTURAL SIMILARITIES/DIFFERENCES COMPARE TO SIMILARITIES/DIFFERENCES IN LIFESTYLE? WHAT MAKES HUMANS UNIQUE? WHAT RELATIONSHIPS BETWEEN ORGANISMS DO YOU FEEL ARE SUPPORTED BY YOUR COMPARISONS OF THEIR FEATURES? WHAT FEATURES DO YOU FEEL DEFINE A PARTICULAR GROUP?
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