Gross Anatomy Of The Piggy-TBC
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Thoracic Body Cavity-Thoracic Inlet
Defines the cranial boundary of TBC Allows passageway of for esophagus, trachea, and blood vessels and nerves Boundaries: dorsal (first thoracic vertebrae) Lateral (first rib) VentrAl (cranial tip of sternum)
Body Cavities
Thoracic (2) Abdominal (1) Pelvic (3)
TBC-Ribs
Lateral boundary of TBC Ribs is determined by the amount of thoracic vertebrae
TBC-Sternum
The ventral boundary of the TBC Provides attachment to the costal cartilages of the sternal ribs Consists of three anatomical parts Cranial:manubrium Middle: body Caudal:meta sternum
TBC- pectoral girdle
Attachment to the shoulder blade to the TBC is muscle, primarily, connective tissue Rats and humans possess a clavicle which articulates with the scapula and manubrium forming a true bony connection with the TBC
TBC-Thoracic Vertebrae
Defines the dorsal boundary of the TBC, including the dorsal end of each rib and the associated muscle and connective tissue It is marked dorsally by well developed spinous processes(withers)
TBC-diaphragm
Defines the caudal boundary of the TBC Consists of connective tissue in the center and striated muscle extending from the connective tissue to the periphery Muscle attachments include…. Costal:cartilage of the last few sternal ribs and behind this is the ribs at an increasing distance from their sternal ends Sternal:upper surface of the xiphoid cartilage LumbAr:attached to first few lumbar vertebrae by means of ligament
TBC-Serous Membranes
Consists of a thin layer of connective tissue and single layer of epithelial cells cemented on it Function: to secrete serous fluid for lubrication Pleura:the major serous membrane of the TBC -parietal layer:layer of pleura that lines the inner wall of the TBC -visceral layer:layer of pleura that covers the lungs -mediastinum:double layer of pleura formed by junction of right and left serous sacs near the midline of the thorax Pericardium: serous membrane that surrounds the heart -parietal layer:forms the pericardial sac -visceral layer:found on surface of the heart
TBC-Visceral of the TBC
Heart Lungs Part of trachea Part of esophagus Thymus, in young animal Associated blood vessels and nerves