The image below shows one horn of the uterus of a cow. Mammary glands are derived from highly modified sweat glands of the skin. The udders of sheep and goats are divided into right and left halves, each with a teat. The cow's udder has four quarters so that there are two teats on each side. Most sows have seven pairs of mammary glands and a total of 14 teats.
Milk is produced in glandular alveoli , and it collects in the cistern of the teat.
The bovine udder is supported by medial and lateral suspensory ligaments which are dominated by elastin and collagen fibers, respectively. In female poultry Figure 1-21d. In poultry, the ovary usually contains a cluster of ova in different stages of development, as shown below. The ova in the most advanced state of development appear as full-sized egg yolks. Here is the glandular region, with the oviduct slit open and laid out flat.