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3. Nov. 2023 · The breasts are found at the anterior thoracic wall, anterior to the deep fascia and pectoral muscles; separated from them by the retromammary space. Each breast consists of mammary glands and surrounding connective tissue.
- Medical Content
- 8 Min.
- Surface Anatomy
- Anatomical Structure
- Vasculature
- Lymphatics
- Nerve Supply
The breast is located on the anterior thoracic wall. It extends horizontally from the lateral border of the sternum to the mid-axillary line. Vertically, it spans between the 2nd and 6thcostal cartilages. It lies superficially to the pectoralis major and serratus anterior muscles. The breast can be considered to be composed of two regions: 1. Circu...
The breast is composed of mammary glands surrounded by a connective tissue stroma. Mammary Glands The mammary glands are modified sweat glands. They consist of a series of ducts and secretory lobules (15-20). Each lobule consists of many alveoli drained by a single lactiferous duct. These ducts converge at the nipplelike spokes of a wheel. Connecti...
Arterial supply to the medial aspect of the breast is via theinternal thoracic artery (also known as internal mammary artery) – a branch of the subclavian artery. The lateral part of the breast receives blood from four vessels: 1. Lateral thoracic and thoracoacromial branches – originate from the axillary artery. 1. Lateral mammary branches – origi...
The lymphatic drainage of the breast is of great clinical importance due to its role in the metastasisof breast cancer cells. There are three groups of lymph nodes that receive lymph from breast tissue – the axillary nodes (75%), parasternal nodes (20%) and posterior intercostal nodes (5%). The skin of the breast also receives lymphatic drainage: 1...
The breast is innervated by the anterior and lateral cutaneous branchesof the 4th to 6th intercostal nerves. These nerves contain both sensory and autonomic nerve fibres (the autonomic fibres regulate smooth muscle and blood vessel tone). It should be noted that these nerves do not control the production and secretion of milk. This is regulated by ...
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Each breast has 15 to 20 sections, called lobes. They are arranged like the petals of a daisy. Each lobe has many smaller structures called lobules. These end in dozens of tiny bulbs that can produce milk. The lobes, lobules, and bulbs are all linked by thin tubes called ducts.
Breasts have a circular body and a nipple in the center, surrounded by a pigmented area of skin called the areola. Each breast has the following boundaries: transversally from the lateral border of the sternum to the midaxillary line and vertically from the second through the sixth ribs.
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20. Feb. 2024 · The anatomical features of the breast include: Nipple: The nipple is a raised structure located in the center of the breast. It contains small muscles that contract in response to stimulation. Areola: The areola is the darker pigmented area surrounding the nipple.
Anatomy of the Breast | Memorial Sloan Kettering Cancer Center. What does the inside of the breast look like? This illustration shows the makeup of breast anatomy both inside and outside. What’s inside your breasts?
20. Jan. 2018 · Breast. The exterior of all humans’ breasts are basically the same; however, the size, shape, and function of breasts vary significantly between the sexes. The key parts of the female...
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