COMPARING HUMAN HEART VALVES AND VESSELS TO THOSE OF OTHER VERTEBRATES

In the human heart, the tricuspid (or right atrioventricular) valve separates the right atrium and ventricle, the pulmonary semilunar valve separates the right ventricle from the pulmonary trunk, the bicuspid valve separates the left atrium and the left ventricle, and the aortic semilunar valve separates the left ventricle from the aorta. The vena cava delivers blood to the right atrium and pulmonary veins deliver blood to the left atrium. What similarities are there in the hearts of other vertebrates?

sharkshark

bony fish (semilunar valve not evident in photo)

bony fish

cat

catcat

cowcow

cow

sheep

sheepshhep

sheep

sheep

sheep

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?