Scent glands are found in the genital area of most mammal

Mammal

Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...

s and in various other parts of the body, such as the underarms of human

Human

Humans are the only living species in the Homo genus...

s and the preorbital glands of deer

Deer

Deer are the ruminant mammals forming the family Cervidae. Species in the Cervidae family include white-tailed deer, elk, moose, red deer, reindeer, fallow deer, roe deer and chital. Male deer of all species and female reindeer grow and shed new antlers each year...

 and muskox. They produce a semi-viscous fluid which contains pheromone

Pheromone

A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting outside the body of the secreting individual to impact the behavior of the receiving individual...

s. These odor-messengers indicate information such as status, territory

Territory (animal)

In ethology the term territory refers to any sociographical area that an animal of a particular species consistently defends against conspecifics...

 marking, mood, and sexual power. The odor may be subliminal

Subliminal

Subliminal may refer to:* Subliminal stimuli* Subliminal , Israeli rapper and producer* Subliminal , an electronic music label...

, not consciously detectable.

Scent glands include:

• apocrine
  Apocrine
  Apocrine is a term used to classify exocrine glands in the study of histology. Cells which are classified as apocrine bud their secretions off through the plasma membrane producing membrane-bound vesicles in the lumen. This method is also called decapitation secretion...
  
   glands, such as in the armpits of humans
• sebaceous gland
  Sebaceous gland
  The sebaceous glands are microscopic glands in the skin that secrete an oily/waxy matter, called sebum, to lubricate and waterproof the skin and hair of mammals...
  
  s, such as the tarsal glands of deer or cranial surface glands of the Red-bellied Lemur
  Red-bellied Lemur
  The Red-bellied Lemur is a medium sized prosimian with a luxuriant chestnut brown coat. This lemur is endemic to eastern Madagascan rainforests and is distinguished by patches of white skin below the eyes, giving rise to a "teardrop" effect, particularly conspicuous in the male.The species, first...
  
  
• flank gland
  Flank gland
  The flank gland is an organ in certain animals the generates scents used to attract mates or deter attack. Animals having flank glands include some voles and shrews. Numerous scientific studies have been carried out on the properties of these structures....
  
  s, such as in voles or shrew
  Shrew
  A shrew or shrew mouse is a small molelike mammal classified in the order Soricomorpha. True shrews are also not to be confused with West Indies shrews, treeshrews, otter shrews, or elephant shrews, which belong to different families or orders.Although its external appearance is generally that of...
  
  s
• pockets, such as the preorbital gland
• anal scent glands, found in most carnivore
  Carnivore
  A carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging...
  
  s and some other mammals
• castor sacs
  Castoreum
  Castoreum is the exudate from the castor sacs of the mature North American Beaver Castor canadensis and the European Beaver Castor fiber. Within the zoological realm, castoreum is the yellowish secretion of the castor sac in combination with the beaver's urine, used during scent marking of territory...
  
  , found in beaver
  Beaver
  The beaver is a primarily nocturnal, large, semi-aquatic rodent. Castor includes two extant species, North American Beaver and Eurasian Beaver . Beavers are known for building dams, canals, and lodges . They are the second-largest rodent in the world...
  
  s