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The efferents of the popliteal lymph nodes pass almost entirely alongside the femoral vessels to the deep inguinal lymph nodes, but a few may accompany the great saphenous vein, and end in the glands of the superficial subinguinal group.
Eccrine glands on their foot pads, like those on palms and soles of humans, did not evolve to cool either but rather increase friction and enhance grip. Dogs and cats have apocrine glands that are specialized in both structure and function located at the eyelids (Moll's glands), ears (ceruminous glands), anal sac, clitoral hood, and circumanal ...
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]
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The violet gland or supracaudal gland is a gland located on the upper surface of the tail of certain mammals, including European badgers and canids such as foxes, wolves, [1] and the domestic dog, [2] as well as the domestic cat. [3] Like many other mammalian secretion glands, the violet gland consists of modified sweat glands and sebaceous glands.
Location Product Structure 1 Apocrine sweat glands: skin: coiled tubular 2 Bauhin's glands, anterior lingual glands tongue, near tip nonserous or mixed 3 Brunner's glands, duodenum: mucous: compound tubular 4 Bronchopulmonary glands: lungs: mucous 5 Bulbourethral glands, Cowper's glands, Mery's glands penis, base pre-ejaculate: tubulo-alveolar ...
When these glands are active, they leave the nose and paw pads slightly moist and help these specialized skin features maintain their functional properties. [4] The odor associated with dog paw pads is much more noticeable on dogs with moist paw pads than on those with dry pads. Dogs also have numerous apocrine glands in their external ear canals.
The glands in this group can be divided into three groups: Merocrine glands – cells secrete their substances by exocytosis. (e.g. mucous and serous glands; also called "eccrine", e.g. major sweat glands of humans, goblet cells, salivary gland, tear gland and intestinal glands)