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Diagram featuring the typical skeletal of a toothed whale (top) and a baleen whale (bottom) The cetacean skeleton is largely made up of cortical bone , which stabilizes the animal in the water. For this reason, the usual terrestrial compact bones, which are finely woven cancellous bone , are replaced with lighter and more elastic material.
A female bottlenose dolphin performing with her trainer. They are considered one of the most intelligent cetaceans. Cetacean intelligence is the overall intelligence and derived cognitive ability of aquatic mammals belonging in the infraorder Cetacea (cetaceans), including baleen whales, porpoises, and dolphins.
The smallest basilosaurid whale is Tutcetus and measures 8.2 ft (2.5 m) long. [34] The large size of basilosaurids is due to the extreme elongation of their lumbar vertebrae. They had a tail fluke, but their body proportions suggest that they swam by caudal undulation and that the fluke was not used for propulsion.
The narwhal was scientifically described by Carl Linnaeus in his 1758 publication Systema Naturae. [5] The word "narwhal" comes from the Old Norse nárhval, meaning 'corpse-whale', which possibly refers to the animal's grey, mottled skin and its habit of remaining motionless when at the water's surface, a behaviour known as "logging" that usually happens in the summer.
Quizlet is a multi-national American company that provides tools for studying and learning. [1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2 ] and released to the public in January 2007. [ 3 ]
That normalcy often includes sore nipples, engorgement of the breasts, trouble getting baby to latch, all of which can make the process very difficult in the first couple of weeks.
Two early 20th century Korean women breastfeeding their babies while working The history and culture of breastfeeding traces the changing social, medical and legal attitudes to breastfeeding, the act of feeding a child breast milk directly from breast to mouth. Breastfeeding may be performed by the infant's mother or by a surrogate, typically called a wet nurse. Ilkhanate prince Ghazan being ...
A baby being breastfed Video summary of article with script. Breastfeeding, also known as nursing, is the process where breast milk is fed to a child. [1] [2] Infants may suck the milk directly from the breast, or milk may be extracted with a pump and then fed to the infant.