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An ommatidium contains a cluster of photoreceptor cells surrounded by support cells and pigment cells. The outer part of the ommatidium is overlaid with a transparent cornea . Each ommatidium is innervated by one axon bundle (usually consisting of 6–9 axons , depending on the number of rhabdomeres ) [ 2 ] : 162 and provides the brain with one ...
Signs of ear infection include shaking of the head, and scratching at or under the ear. Some animals may also paw the ear or try to rub it on other objects to relieve pain and discomfort. Ear infections often result in a darker red ear, dirt in the ear, or a general inflamed appearance. Chronic allergic otitis externa in a dog with atopic ...
When dogs have an ear infection secondary to a food allergy, an exclusion diet can clear this problem up and keep the dog out of pain. 4. Grooming.
Compound eye of Antarctic krill as imaged by an electron microscope. A compound eye is a visual organ found in arthropods such as insects and crustaceans.It may consist of thousands of ommatidia, [1] which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color.
8. Corgi. The corgi—aka, everyone’s favorite short-legged pup—is one of the most recognizable dogs with pointy ears. Beloved by Queen Elizabeth II, these dogs have been favored by the kings ...
The pocket is situated in the approximate location of the antitragus in the human ear. It occurs in a number of mammalian species, including weasels and bats, but is particularly noticeable on the domestic cat, as well as some dog breeds. The pocket is of unknown function, [2] and it is unclear if it has any at all. [1]