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This process continues into old age, where whether with a microscope or with the human eye, the thymus may be difficult to detect, [4] although typically weighs 5–15 grams. [3] Additionally, there is an increasing body of evidence showing that age-related thymic involution is found in most, if not all, vertebrate species with a thymus ...
Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
A thymoma is a tumor originating from the epithelial cells of the thymus that is considered a rare neoplasm. [1] Thymomas are frequently associated with neuromuscular disorders such as myasthenia gravis; [2] thymoma is found in 20% of patients with myasthenia gravis. [3] Once diagnosed, thymomas may be removed surgically.
This category contains articles about the physical structure and appearance of the domestic dog. For diseases and disorders of dog anatomy, see Category:Dog health . Pages in category "Dog anatomy"
Pilliner S, Elmhurst S and Davies Z (2009) The Horse in Motion: The Anatomy and Physiology of Equine Locomotion John Wiley & Sons. ISBN 9781405147484. Stonehenge (2011) The Comparative Anatomy of Man, the Horse, and the Dog - Containing Information on Skeletons, the Nervous System and Other Aspects of Anatomy Abhedananda Press. ISBN 9781446536407.
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In the 1980s, there have been changes in the pet dog's functions, such as the increased role of dogs in the emotional support of their human guardians. [195] [196] [197] Within the second half of the 20th century, more and more dog owners considered their animal to be a part of the family.
Histologic specimen being placed on the stage of an optical microscope Human lung tissue stained with hematoxylin and eosin as seen under a microscope. Histology, [help 1] also known as microscopic anatomy or microanatomy, [1] is the branch of biology that studies the microscopic anatomy of biological tissues.