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Because the eye has a retina, lens, and nerves connected to the brain, it’s possible it was a fully working eye at some point in the animal’s evolutionary journey. But through the years, the ...
Octopuses have three hearts; a systemic or main heart that circulates blood around the body and two branchial or gill hearts that pump it through each of the two gills. The systemic heart becomes inactive when the animal is swimming. Thus the octopus tires quickly and prefers to crawl.
Pseudoruminant is a classification of animals based on their digestive tract differing from the ruminants. Hippopotami and camels are ungulate mammals with a three-chambered stomach (ruminants have a four-chambered stomach) while equids (horses, asses, zebras) and rhinoceroses are monogastric herbivores. [1] [2]
Their fore stomach has fermentation carried out by microbes and has high levels of volatile fatty acid; it has been proposed that their complex fore-stomach is a means to slow digestive passage and increase digestive efficiency. [34] Hippopotamuses have three-chambered stomachs and do not ruminate.
Two-headed animals (called bicephalic or dicephalic) and three-headed (tricephalic) animals are the only type of multi-headed creatures seen in the real world, and form by the same process as conjoined twins from monozygotic twin embryos. [2] In humans, there are two forms of twinning that can lead to two heads being supported by a single torso ...
The beak is considerably smaller than some found in the stomachs of sperm whales, [55] [56] suggesting other colossal squid are much larger than this one. [55] [56] The eye is 27 cm (10 + 1 ⁄ 2 in) wide, with a lens 12 cm (4 + 1 ⁄ 2 in) across. This is the largest eye of any known animal. [30]
Because of this, camelids have to lie down by resting on their knees with their legs tucked underneath their bodies. [1] They have three-chambered stomachs, rather than four-chambered ones; their upper lips are split in two, with each part separately mobile; and, uniquely among mammals, their red blood cells are elliptical. [2]
(from Wiedersheim's Comparative Anatomy) Food digestion in the simple stomach of nonruminant animals versus ruminants [21] The primary difference between ruminants and nonruminants is that ruminants' stomachs have four compartments: rumen—primary site of microbial fermentation; reticulum; omasum—receives chewed cud, and absorbs volatile ...