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Whales range in size from the 2.6-metre (8.5 ft) and 135-kilogram (298 lb) dwarf sperm whale to the 34-metre (112 ft) and 190-metric-ton (210-short-ton) blue whale. Overall, they tend to dwarf other cetartiodactyls; the blue whale is the largest creature on Earth.
Baleen whales have fibroelastic (connective tissue) penises, similar to those of artiodactyls. The tip of the penis, which tapers toward the end, is called the pars intrapraeputialis or terminal cone. [117] The blue whale has the largest penis of any organism on the planet, typically measuring 2.4–3.0 metres (8–10 ft). [118]
There are approximately 89 [8] living species split into two parvorders: Odontoceti or toothed whales (containing porpoises, dolphins, other predatory whales like the beluga and the sperm whale, and the poorly understood beaked whales) and the filter feeding Mysticeti or baleen whales (which includes species like the blue whale, the humpback ...
The muscles connected to the ears of a human do not develop enough to have the same mobility allowed to monkeys. Arrows show the vestigial structure called Darwin's tubercle. In the context of human evolution, vestigiality involves those traits occurring in humans that have lost all or most of their original function through evolution. Although ...
Beaked whales have several anatomical adaptations to deep diving: large spleens, livers, and body shape. Most cetaceans have small spleens. However, beaked whales have much larger spleens than delphinids, and may have larger livers, as well. These anatomical traits, which are important for filtering blood, could be adaptations to deep diving.
In terms of length, blue whales have often been compared to three school buses lined up back to back. These whales measure 90-100 feet long and are estimated to weigh from 200,000-352,000 pounds ...
It’s hard to know the total length of the animal as no legs or tail vertebrae were found, but researchers estimate a length of at 10 to 20 ft (3.0 to 6.1 m) considering the head would have been nearly three feet long for a living animal. Georgiacetus was equipped as an active predator capable of taking and processing large prey. There was a ...
A basilosaurid was as big as the larger modern whales, with genera like Basilosaurus reaching lengths of up to 60 ft (18 m) long; dorudontines were smaller, with genera like Dorudon reaching about 15 ft (4.6 m) long. The smallest basilosaurid whale is Tutcetus and measures 8.2 ft (2.5 m) long. [34]