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see mammary glandmammary gland,
organ of the female mammal that produces and secretes milk for the nourishment of the young. A mammal may have from 1 to 11 pairs of mammary glands, depending on the species. Generally, those mammals that bear larger litters have more glands.
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the mammary glands of agricultural animals. In ruminants and mares the udder is located in the inguinal region, between the thighs. In swine udders are symmetrically placed right and left of the white line on the belly. The udder of the cow, camel, and reindeer consists of two fore, or belly, parts and two rear, or hip, parts. Milk is synthesized in the secreting epithelium of tiny sacs called alveoli. Each cell synthesizes milk with each of its constituent parts. Alveoli, the largest of which include up to 100 epithelium cells each, are placed radially around the milk ducts. These ducts unite to form larger ones and open into milk cisterns. Milk is retained in the udder because of capillary action, as well as the presence of circular closing muscles (sphincters) in the teats. The udder is well supplied with blood, because 500 liters of blood must pass through the udder in order to make 1 kg of milk.

In heifers the glandular tissues of the udder begin to grow with the onset of sexual maturity and develop very intensely not long before calving. (In pregnant cows this is in the second half of the dry period, a month before calving.) In dairy cows the udder is goblet-shaped and set forward. It is firmly attached to the body (not hanging), and its parts are even and symmetrically placed. This kind of udder is soft, pliant, and elastic to the touch; after milking it becomes smaller and has long, twisted, clearly visible veins. The udders of sheep, goats, and mares each consist of two complexes of glands and two teats.


Zaks, M. G. Molochnaia zheleza. Moscow-Leningrad, 1964. Chapter 1. [5_1570_1]


(vertebrate zoology)
A pendulous organ consisting of several mammary glands enclosed in a single envelope; each gland has its own nipple; found in some mammals, such as the cow and goat.


the large baglike mammary gland of cows, sheep, etc., having two or more teats
References in periodicals archive ?
Recent literature describe the use of ultrasonography for estimating the size of udder cisterns in recent domestic species.
Keywords: Probiotics; Antagonistic properties; Sanitization of udder; Microbial load of the udder teats skin; Milk quality; Somatic cells
Sources of IMI during the dry period originated either from bacteria remaining in the udder during lactation, or new IMI during the dry period (Green et al.
Older ewes were also found to be more prone to acute mastitis and those with the infection were significantly more likely to have a lump in the udder when examined later in the same lactation.
Herd effects were significant for stature chest width body depth rear legs set foot angle rear udder height central ligament udder depth rear udder width thurl width dewlap width and dewlap visual score (Pless than 0.
Shaken Udder recipes have natural ingredients, with nothing artificial added.
We know some ranchers who clip the hairy udders at calving time.
This study was carried out to determine the relationships between somatic cell count (SCC) and udder type scores (UTS) of Holstein cows.
Milk yield and some of the standards body and udder measurements were recorded.
Summary: A toddler in Cambodia has taken to feeding himself milk directly from the udders of a cow.
SELECTIVE breeding of dairy cows for increased yield of milk has resulted in big bony animals with large udders.