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23 Cards in this Set
- Front
- Back
Name the dorsal, lateral, and ventral borders of the thoracic cavity
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Dorsal- Vertebral bodies
Lateral- Thoracic wall (ribs, muscles, costal cartilages) Ventral- Sternum |
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Describe the fiber direction, attachment, and function of the External intercostal muscles found on the thoracic wall
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Fibers run caudoventrally from caudal border of one rib to cranial border of the rib behind.
Function is Inspiration |
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Describe the fiber direction, attachment, and function of the Internal intercostal muscles found on the thoracic wall
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Fibers run cranioventrally from cranial border of one rib to caudal border of the rib in front.
Function is Expiration |
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Name the lateral, dorsal, and ventral boundaries of the thoracic inlet
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Lateral- 1st pair of ribs and their costal cartilages
Dorsal- body of 1st thoracic vertebra and longus colli m. Ventral- Manubrium of sternum |
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Name 5 structures that pass through the thoracic inlet
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1. Trachea
2. Esophagus 3. Nerves 4. Vessels (External Jugular v., etc) 5. Apices of pleural cavities |
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Describe the boundaries of the thoracic OUTLET
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Bounded dorsally by the last thoracic vertebra and first few lumbar vertebrae, ribs, costal arch, and xiphoid process of sternum; "closed" by diaphragm
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Thin, connective tissue layer lining the thoracic cavity. Provides a base to which the pleura tightly adhere
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Endothoracic fascia
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Serous Membranes
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Specialized tissue that lines body cavities, is made of a single layer of epithelial cells, and adheres to fascia. Produce serous fluid to decrease friction.
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Lines the thoracic cavity and surrounds the lungs
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Pleura
**Each pleural membrane (right & left) is 1 continuous sheet but specific areas of the lining are named according to the structure they line |
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Pleura on the surface of the lungs
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Pulmonary Pleura
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Pleura lining non-visceral structures
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Parietal pleura
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Lines inner surface of ribs, intercostal muscles, costal cartilages
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Costal Parietal Pleura
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Covers the partition between the 2 pleural cavities.
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Mediastinal Parietal Pleura
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The space between the right and left pleural cavities
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Mediastinum
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In which species is the mediastinum usually fenestrated?
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Horse
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Lines the diaphragm
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Diaphragmatic parietal pleura
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The diaphragmatic parietal pleura tuns (reflects) to become the costal parietal pleura, which forms a line called the __________
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Diaphragmatic line of pleural reflection
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True or False
The mediastinal pleura is continuous with the pulmonary pleura |
TRUE
Caudal to the hilus of lung, this connection forms a free border from the caudal lung to the mediastinum called the pulmonary ligament |
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Serous membrane lining the pericardial cavity
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Pericardium
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The pleura forms 2 complete (right & left) sacs known as ____________
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Pleural cavities
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True or False
The pleural cavities are empty spaces |
FALSE
They contain a small amount of serous fluid |
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The basal border of the lung can be approximated by drawing a line between what 2 anatomical structures?
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The olecranon & the next to last dorsal intercostal space
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आर्यः
ārya |
Aryan
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