It’s an animal that does not exist on Earth today and which poses some serious challenges to a chance explanations. It’s a dinosaur called the barosaurus. Skeletal remains of this animal show that its head would have towered fifty feet (more than 15 m) above the ground. We have seen drawings of these huge herbivorous dinosaurs. Many of us have seen the reconstructions based on the bones such as the one shown in the American Museum of Natural History in New York. No one denies the size of the animal. The problems come when we start looking at its anatomy. The problem of dinosaur blood pressure raises some serious questions.
The animal with the longest neck today is the giraffe. To get blood to its brain, a giraffe has a systolic blood pressure as high as 350. Systolic pressure is the pressure produced when the heart contracts. For humans, anything over 140 is considered high. To create that much pressure, the weight of the giraffe’s heart weighs is about 25 pounds (11.3 kg). A human heart weighs about 11 ounces (310 grams). For a barosaurus, the heart would have to weigh tons. Also, the blood vessels would have to be extraordinarily thick. It is difficult, if not impossible, to believe that such conditions could exist.
Years ago, two scientists working at the investigative Cardiology Laboratory at St. Luke’s Roosevelt Hospital Center in New York developed a proposal that barosaurus had eight hearts. They suggested a heart like ours pumped blood from the body to the lungs and back. They then suggested a complicated series of seven other hearts. Their idea was that there would be a single-chamber secondary heart above the primary one. It would have one-way valves to boost the blood into the neck. Above the second heart, the artery would divide into two branches sending blood to the brain. Three hearts along each branching artery would pump the blood to the next heart until it reached the brain. This arrangement would reduce the dinosaur blood pressure so that the systolic pressure would max out at about 180.
This is a theory which in all probability will always remain as just another imaginative proposal. It is doubtful that there will ever be any way to test it. The point is that the anatomical complexity and the number of critical parameters required would make this dinosaur blood pressure system virtually impossible to happen by chance. Each heart’s pressure would have to be critically adjusted to just enough to move the blood to the next level. If the dinosaur blood pressure were too high, it would damage the delicate valves of the next heart. What would happen when the animal ran? Each heart would have to speed up, but not at the same rate.
We suggest that proposals like this defy any possible accidental cause. If a person wants to accept chance as a faith proposition in spite of its inadequacies, they are certainly free to do so. But the more variables that must be controlled to achieve the desired effect, the less likely it is that the result can be a product of chance. They can better be explained by design.
— John N. Clayton © 2019