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23 Cards in this Set

  • Front
  • Back
Name the dorsal, lateral, and ventral borders of the thoracic cavity
Dorsal- Vertebral bodies
Lateral- Thoracic wall (ribs, muscles, costal cartilages)
Ventral- Sternum
Describe the fiber direction, attachment, and function of the External intercostal muscles found on the thoracic wall
Fibers run caudoventrally from caudal border of one rib to cranial border of the rib behind.
Function is Inspiration
Describe the fiber direction, attachment, and function of the Internal intercostal muscles found on the thoracic wall
Fibers run cranioventrally from cranial border of one rib to caudal border of the rib in front.
Function is Expiration
Name the lateral, dorsal, and ventral boundaries of the thoracic inlet
Lateral- 1st pair of ribs and their costal cartilages
Dorsal- body of 1st thoracic vertebra and longus colli m.
Ventral- Manubrium of sternum
Name 5 structures that pass through the thoracic inlet
1. Trachea
2. Esophagus
3. Nerves
4. Vessels (External Jugular v., etc)
5. Apices of pleural cavities
Describe the boundaries of the thoracic OUTLET
Bounded dorsally by the last thoracic vertebra and first few lumbar vertebrae, ribs, costal arch, and xiphoid process of sternum; "closed" by diaphragm
Thin, connective tissue layer lining the thoracic cavity. Provides a base to which the pleura tightly adhere
Endothoracic fascia
Serous Membranes
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.
Lines the thoracic cavity and surrounds the lungs
Pleura

**Each pleural membrane (right & left) is 1 continuous sheet but specific areas of the lining are named according to the structure they line
Pleura on the surface of the lungs
Pulmonary Pleura
Pleura lining non-visceral structures
Parietal pleura
Lines inner surface of ribs, intercostal muscles, costal cartilages
Costal Parietal Pleura
Covers the partition between the 2 pleural cavities.
Mediastinal Parietal Pleura
The space between the right and left pleural cavities
Mediastinum
In which species is the mediastinum usually fenestrated?
Horse
Lines the diaphragm
Diaphragmatic parietal pleura
The diaphragmatic parietal pleura tuns (reflects) to become the costal parietal pleura, which forms a line called the __________
Diaphragmatic line of pleural reflection
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
Serous membrane lining the pericardial cavity
Pericardium
The pleura forms 2 complete (right & left) sacs known as ____________
Pleural cavities
True or False
The pleural cavities are empty spaces
FALSE
They contain a small amount of serous fluid
The basal border of the lung can be approximated by drawing a line between what 2 anatomical structures?
The olecranon & the next to last dorsal intercostal space
आर्यः
ārya
Aryan