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Body Wall and Cavity Abdominal Surface and underyling bones Muscular Wall and Hernias Peritoneum and Mesenteries Thorax Surface Ribs and Intercostal Muscles Breast Bony Landmarks around Abdomen Iliac crest Anterior superior iliac spine (ASIS) Pubic crest Inguinal ligament Costal margin Xiphoid process Abdominal Wall from surface Rectus abdominus Linea alba Iliac crest Muscles of abdominal wall Rectus abdominus-vertical midline Three layers form tube External oblique (“hands-in-pocket”) Internal oblique (fibers perpendicular to external) Transverse abdominus (wraps around) Muscles of abdominal wall--details Please see Fig. 11.11, M&M for accurate labeling. Abdominal muscular wall pressurizes abdomen When? Cough Sneeze Urinate Defecate Birth Lifting For article on abdominal muscles, role of different layers and use of lifting belts: http://www.paulchekseminars.com/articles.cfm?select=16#top Inguinal hernia results because pressure finds weak spot at inguinal canal (back to basic body plan) Mesenteries, peritoneum--what is retroperitoneal? [board drawing] Peritoneal vs Retroperitoneal Laproscopic kidney donation with retroperitoneal access THORAX SURFACE ANATOMY Student who cheated in anatomy lab: counted own ribs Males and Females have same number of ribs (no, Eve wasn’t formed from one of Adam’s) BONES STERNUM manubrium xiphoid process RIBS INTERCOSTAL MUSCLES “COSTAL” = ribs “intercostal” = between the ribs Function in posture, respiration The Breast Location Superior border: 2nd rib Inferior border: 6th rib Medial border: Sternum Lateral border: Midaxillary line Underlying muscle Pectoralis major and minor Part of serratus anterior, external obliques Mammary Glands (within breast) Mammary Glands (within breast) Lactiferous (modified sweat) Glands Breast made of 15-25 lobes (each a compound alveolar gland) Lobes made of lobules called acini, alveoli Acini/Alveoli lined w/milk-secreting simple epithelial cells Lactiferous Ducts of lobes open at nipple Areola-ring of pigmented skin around nipple Sebaceous gland produce sebum during nursing Lobes separated by adipose tissue and suspended by connective tissue = Suspensory Ligaments of the Breasts Mammary Glands Lactiferous (modified sweat) Glands Breast made of 15-25 lobes (each a compound alveolar gland) Lobes made of lobules called acini, alveoli Acini/Alveoli lined w/milk-secreting simple epithelial cells Lactiferous Ducts of lobes open at nipple Areola-ring of pigmented skin around nipple Sebaceous gland produce sebum during nursing Lobes separated by adipose tissue and suspended by connective tissue = Suspensory Ligaments of the Breasts
