Exam (elaborations) IBCLC 2023/

When does the breast begin to develop in utero? - ANSWER 4th week of gestation Where does the primitive milk streak develop - ANSWER Bilaterally from the axilla to the groin By the 5th week gestation the milk streak becomes what? - ANSWER Mammary Milk Ridge (or milk line) Thickening and inward growth into the chest wall continues during what weeks gestation? - ANSWER 7-8 weeks gestation Between weeks 12 and 16 gestation specialized cells differentiate into what? - ANSWER Smooth muscles of the nipple and areola What forms the mammary pit? - ANSWER Lactiferous ducts and their branches open into a shallow epithelial depression What creates an inverted nipple? - ANSWER When the Mammary pit fails to elevate What is witches milk? - ANSWER After birth, a neonate's mammary tissue (under the influence of maternal hormones) might recreate colostral like fluid At what age do the primary and secondary ducts grow and divide and form the terminal end buds that become the alveoli? - ANSWER 10-12 years old When does complete development of mammary function occur? - ANSWER During pregnancy What is superficial fiscia? - ANSWER Fibrous tissue beneath the skin Where is the breast located? - ANSWER In the superficial fascia between the second rib and sixth intercostal space What are the two major divisions of the breast? - ANSWER Parenchyma and Stroma What makes up the Parenchyma? - ANSWER Ducts, lobes, and aveoli What are alveoli? - ANSWER Small sacs where milk is secreted What makes up the Stroma? - ANSWER Connective tissue, fat tissue, blood vessels, nerves, and lymphatics. What is Cooper's Ligament? - ANSWER Suspensory ligament that are the fibrous connections between the inner side of the breast skin and pectoral muscles. Help to shape the breasts What does the nipple contain? - ANSWER 15-25 milk ducts, smooth muscle fibers, sebaceous and apocrine sweat glands, and dense innervations of sensory nerve endings What are Montgomery Tubercles? - ANSWER Sebaceous glands in the areola surrounding the nipple What do the Montgomery Tubercles secrete? - ANSWER Oily secretions (lipoid fluid) to keep the areola and the nipple lubricated and protected What artery(s) supply blood to the breast? - ANSWER Internal mammary artery (60%) and lateral thoracic artery (30%) Where does the lymphatic system of the breast drain excess fluids from tissue space, bacteria and cast off cells? - ANSWER Auxiliary lymph node Where does the nerves of the breast mainly branch from? - ANSWER 4th, 5th, and 6th intercostal nerve What nerve supplies the greatest amount of sensation to the areola? - ANSWER 4th intercostal nerve What part of the breast is most sensitive? - ANSWER The areola followed by the general skin of the breast, and then the nipple which is least sensitive.