BODY WALLS Flashcards
Thoracic Wall composed of…
Skin, Fascia, Nerves, Vessels, Muscles, Cartilages and Bone
Functions of Thoracic Wall
Resist the negative internal pressures generated by the elastic recoil of the lungs and inspiratory movements.
Provides attachment for and support the weight of the upper limbs.
Provides attachment for many of the muscles of the upper limbs, neck, abdomen, and back and the muscles of respiration.
Structures of thoracic wall
Ribs, Costal Cartilage, Sternum, Thoracic Vertebrae, Intervertebral Disc and Apertures
Ribs Clasification
True, False and Free
True Ribs
1-7
False Ribs
8-10
Free Ribs
11-12
Sternum division
Manubrium, Body and Xyphoid process
Structures of thoracic wall
Costal Vertebral Joint
Body of vertebra superior to rib, Invertebrate Disc, Head of Rib (Crest) and Body of vertebra of same number as rib
Costo-transverse joint
Tubercle of rib and Transverse process of vertebra of same number of rib
Thoracic Wall Movements: Inspiration
Increase the intrathoracic diameters and volume of the thorax
Thoracic Wall Movements: Passive Expiration
Decreasing intrathoracic volume and increasing intrathoracic pressure, expelling air from the lungs through the same passages.
The diaphragm, intercostal muscles, and other muscles relax.
Accessory muscles for respiration
Pectoralis Major, Pectoralis Minor, Inferior part of the Serratus Anterior
Pectoralis major
Movement of shoulder joints, flexion, adduction and medial rotation of the humerus
Pectoralis minor
Depresses the point of the shoulder
Serratus Anterior
Pulls the Scapula forward around the thorax
Muscles of the thoracic wall
External intercostal, Internal intercostal, Innermost Intercostal, Subcostal, Transversus Thoracis, Serratus Posterior Superior, Serratus posterior inferior, Levatores Costarum
External intercostal
Membrane located anterior medial (body of sternum)
Internal Intercostal
Membrane located Posterior medial (vertebral column)
Transversus thoracis
Body of sternum and costal cartilage
Subcostal
Connects between 7-9 rib, rib 8 left out
Breast composed of:
glandular and supporting fibrous tissue embedded within a fatty matrix, together with blood vessels, lymphatics and nerves
Mammary glands
Subcutaneous tissue overlying the pectoral’s major and minor muscles
Nipple
The greatest prominence of the breast, surrounded by a circular pigmented area of skin, the areola. Innervation by T4.
Bed of the breast
Extends from the 2nd Rib and 6th or 7th Rib
Axillary Process (Tail of spence)
The bed of the breast extending along the inferolateral edge of the pectorals major toward the axillary fossa (armpit)
Axillary Nodes
Subscapular, Humeral, Pectoral, Central and Apical
Parts of the Breast
Suspensory ligaments (Cooper), Fat Lobule, Areola, Nipple, Lactiferous Duct, Lactiferous Sinus and Lobules of Mammary Gland
Breast Irrigation
Lateral thoracic artery, lateral mammary branches, internal thoracic artery, medial mammary branches
Breast Drainage
Lateral thoracic vein, lateral mammary vein, Internal thoracic vein, medial mammary vein