It is said to be a royal among sea animals because it has blue blood, literally. While it uses two of its hearts to pump blood into the gills (the lung of the fish) where it absorbs oxygen, the third heart pumps blood into the other organs.
The circulatory system in fishes is a single circuit, with blood flowing from the heart to the gills and then to the rest of the body. The heart is located a little behind and below the gills. The typical fish heart has four chambers, however unlike mammals, blood moves through all four in sequence.
However, fish have unique hearts. They have one atrium and one ventricle, but they also have two structures that aren't seen in humans. The "sinus venosus" is a sac that sits before the atrium and the "bulbus arteriosus" is a tube located just after the ventricle.
Even though fish don't have the same brain structures that humans do—fish do not have a neocortex, for example—Dr. Ian Duncan reminds us that we “have to look at behaviour and physiology,” not just anatomy. “It's possible for a brain to evolve in different ways,” he says. “That's what is happening in the fish line.
three heartsAn octopus's three hearts have slightly different roles. One heart circulates blood around the body, while the other two pump it past the gills, to pick up oxygen.
Cows have only one heart. Just like humans and other mammals and birds, the heart is internally divided into four chambers.
Blood. Squid blood is blue, not red as in humans. This is because squid blood contains a copper-containing compound called haemocyanin. In humans, the blood is red and contains the iron compound haemoglobin.
Fish yawn, cough, and even burp. "Since fishes lack the parts of the brain that set us apart from the fishes — the cerebral cortex — I doubt very much that fishes engage in anything like crying," Webster told LiveScience. "And certainly they produce no tears, since their eyes are constantly bathed in a watery medium."
Like the human heart, the chicken heart has four chambers - a right atrium and ventricle which receives deoxygenated blood from the body and sends it to the lungs and a left atrium and ventricle which receives oxygenated blood from the lungs and sends it to the body. Birds have a much higher metabolic rate than humans.
BrachiopodsBrachiopods have black blood. Octopuses have a copper-based blood called hemocyanin that can absorb all colors except blue, which it reflects, hence making the octopus' blood appear blue.
Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. Octopuses and horseshoe crabs have blue blood. This is because the protein transporting oxygen in their blood, hemocyanin, is actually blue.
Fresca fans can finally breathe a sigh of relief. Luckily, those shortages are over, and Fresca is back. The beverage survived being discontinued by Coca-Cola (TaB and Northern Neck Ginger Ale weren't so lucky), and Fresca made an entrance when it reemerged sporting a new size offering.
Substitute For Nutmeg You can always substitute ground nutmeg for nutmeg freshly ground from a pod but the flavor won't be quite as pungent. OR - If you have a jar of pumpkin pie spice you can use equal amounts of that to replace nutmeg.
Most freshmen live in dormitories on the Old Campus, the historical center of Yale College. Members of Timothy Dwight, Silliman, Benjamin Franklin, and Pauli Murray are the only students to live in their college as freshmen. Thereafter, students take rooms within the residential college by a lottery system.