All About Breasts

Our Beautiful Biology

Throughout history, the female breast has been a locus of art, sexuality, eroticism, fertility, abundance, and nurturance. The symbolism and politics of this sacred anatomy have evolved to fit the standards and beliefs of each time and culture. Ancient Egyptians, for example, represented breasts in their art, typically for religious purposes, while showing female deities breastfeeding pharaohs as proof of their divine status. The Ancient Romans were more liberal in expressing the sensuality of the female body in their masterpieces. At the same time, the Middle Ages, shaped by strict religious discipline, held more modest representations of the female body.

Despite the varying, often objectifying, representations of the female breast in art and culture, breasts are an evolutionary powerhouse. With their complex system of glands, ducts, and high concentrations of estrogen receptors, breasts are responsible for fascinating anatomical functions, such as helping puberty occur at the optimal time and creating nature’s most perfect food, nutrient-rich breast milk.

Breast Anatomy 101

The breasts are medically known as the mammary glands, and these glands are made up of lobules (milk-producing glandular structures) and a system of ducts that transport milk to the nipple for breastfeeding.

  • Breast tissue develops in the fetus along milk lines, extending from the armpit to the groin. The technical term for milk lines is ventral epidermal ridges, which are precursors to the mammary glands and nipples.
  • Each breast has 15 to 20 lobes that radially surround the nipple, like spokes on a wheel. Inside these lobes are smaller sections called lobules.
  • At the end of each lobule are tiny bulbs that produce milk. These structures are linked by small tubes called ducts, which carry milk to the nipples.
  • Between the glandular tissue and ducts, the breast contains fat and connective tissue.
  • The nipple is in the center of a dark area of skin called the areola. The areola contains tiny glands that lubricate the nipple during breastfeeding.
  • Each breast also contains blood vessels and vessels that transport lymph. Lymph is a fluid that travels through a network of channels called the lymphatic system and carries cells that help the body fight infections.

Breasts Make Nature’s Most Perfect Food

It is no wonder that breast milk is referred to as “Liquid Gold.” It contains 100% of the daily fat, proteins, vitamins, minerals, sugars, enzymes, and antibodies that a baby needs to grow and ward off disease. Human infants are designed to be exclusively breastfed for about six months, and then the baby graduates to eat some food in addition to breast milk. Here are some of the incredible health benefits of breast milk:

  • The first feedings contain colostrum, which delivers a high concentration of antibodies. The laxative effect of colostrum gently clears the baby’s intestine, decreasing the chance of jaundice.
  • It contains antibodies, enzymes, and white blood cells, which protect your baby from viral, bacterial, and parasitic infections.
  • It encourages the growth of probiotics and “good” bacteria in the digestive tract.
  • Additional immune components in breast milk protect against food allergies and eczema early in life.
  • Breast milk protects against common childhood illnesses such as vomiting, diarrhea, pneumonia, urinary tract infections, and types of meningitis. It can protect against chronic conditions like celiac disease, inflammatory bowel disease, and asthma.
  • Breastfeeding lowers the risk of Sudden Infant Death Syndrome (SIDS) and increases the effectiveness of immunizations.
  • When at your breast, the sucking action of your baby strengthens their oral muscles and facial bones and supports good dental development.
  • Breastfeeding supports brain development and is shown to improve IQ scores later in life.
  • Breastfeeding may help prevent obesity and lower your child’s risk of developing diabetes in adolescence and adulthood.
  • The hormones released while you feed your little one help to lower your stress levels.

A Walkie-Talkie for Mom and Baby

Breasts are the gateway of communication between mom and baby. Nature has designed the breast to make a perfect product for its offspring. Here are some ways breasts communicate with the mom and the infant.

  • Areolas give off a scent. Around the edge of the areola are little bumps called Montgomery’s glands. When nursing, these glands produce a scent that only babies can detect. It smells like amniotic fluid, so the baby is drawn to the area.
  • The areola becomes darker during pregnancy and breastfeeding. Babies can see shades of lights and darks early on. By the areolas getting darker, it helps the baby recognize it.
  • A baby’s hands are designed to knead the breasts and stimulate the milk while their feet help them push up toward their mom’s breast.
  • When the breast senses an infection, it tips off the mom’s immune system to release more lactoferrin and relevant antibodies.
  • When the baby is older than one year, the milk adapts to contain more fat and cholesterol to match the child’s more active lifestyle.
  • If the baby is born prematurely, breast milk will increase protein and caloric density.
  • The breast knows when the mom is stressed and will hold back her milk output until the stress response has been averted. Stress can also put cortisol into the milk supply, affecting the baby’s personality. These are good reasons to focus on self-care and relaxation techniques whenever possible.
  • Cells in the breast communicate with cells in the bone, telling the bones how much calcium content it needs to release to make the perfect formula. During breastfeeding, a mom loses up to 6% of her calcium for her little one, so it is important to replenish that in the diet.

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