COMPARING HUMAN BLOOD VESSELS TO THOSE OF OTHER VERTEBRATES: GASTROINTESTINAL TRACT

4) BLOOD VESSELS TO THE GASTROINTESTINAL TRACT

In humans, t he dorsal aorta sends out several unpaired arteries to the abdominal organs: the celiac, anterior mesenteric, and posterior mesenteric arteries.   The hepatic, left gastric, and splenic arteries originate from the celiac.  What similarities and differences do you notice in other vertebrates?

Shark:

shark

frog and salamander

frogsalamander

TURTLE AND OPOSSUM

turtleopossum

cat

catcat

monkey

monkey

monkey

Instead of emptying into the inferior vena cava, venous blood from the digestive tract travels to the liver through the hepatic portal vein. Do other vertebrates posssess a similar arrangement?

shark and gar

sharkgar

Lungfish and salamander

lungfish

salamander

opossum and cat

opossum

cat

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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