embriología

Embryology, Breast Anatomy and Histology

What is embryology? It is in charge of studying the formation and development of the embryo until its birth.

mammary gland It is responsible for the production of milk for feeding newborns

Its structure is complete: *includes fat, connective and granular tissue, as well as lobules, lobules, ducts, lymph nodes, blood vessels and ligaments.

histology

*The breast occupies the anterior or upper region of the thoracic wall and extends from the 2nd and 6th rib to the sternum *It is a sweat gland, with an approximate weight of 150 to 225 gr *Each breast has between 15 and 20 sections called lobules, which are arranged like the petals of a daisy. *Each lobe has many smaller lobules that end in tiny bulbs that produce milk. The lobes, lobules, and bulbs are attached by fine tubes called ducts. These ducts lead to the nipple in the center of a dark area of ​​skin called the areola.

*The first stage begins from the fertilization of the egg and has a duration of about four weeks. Therefore, embryology in the second week of pregnancy focuses on this stage.

*In this second month the spinal cord, brain, heart, intestine and skin originate. The eyes, ears, nose, and upper lip of the mouth are also beginning to form.

*As of this month, the embryonic period ends and it is renamed a fetus. In the third month of pregnancy, the future baby has already developed all its organs, although, for the moment, they are not fully formed. They need to mature and finish evolving correctly. Although the genitals will also be defined, it is still early to be able to accurately determine the sex of the baby.

*In the fourth month the fetus is covered with lanugo, a very fine hair that covers the skin when the body does not have enough fat, so it acts as a body heat preserver.

*In the fifth month the cardiac cavities are defined and the heart is already beating strongly. Other important changes also occur in this period, in which the senses, such as taste, develop as a result of the development of taste buds. In addition, he begins to perceive sounds and lights. At the end of this month, the baby can reach approximately 22-25 centimeters.

*In the sixth month Regarding the hair of the future baby, the eyebrows, hair and eyelashes have already been created. His muscles are also forming and, thanks to that and the length of the umbilical cord, he can move with more energy than before. The evolution of the baby goes from measuring from 27 cm to 32 cm approximately, and from weighing about 450 grams to about 750-1000 grams.

* In the seventh month In this period, the lungs develop and the skeleton becomes more consistent. In addition, fat is already beginning to accumulate in his body, which will allow him to control his temperature after birth.

* At the eighth month: olfactory neurons are also created, a sign that the brain does not stop evolving either. The baby's first hiccups begin. The cause is that he is swallowing amniotic fluid, something that at the same time causes jerky movements as a consequence.

*In the ninth month the baby descends into the pelvis and the head begins to fit into it. The stomach and intestine are already working. Your skin is no longer wrinkled and smoother due to the fat cells that have already formed under it. The color of the skin is no longer so red, but it begins to blush and is more similar to the final color that it will have at the time of delivery.

External appearance: nipple, areola and skin The areola contains the Montgomery glands. The nipple has longitudinal and circular smooth muscle fibers that produce its