2.9 topographic anatomy of the ventral neck, & the thoracic cavity

trachea
Click the card to flip 👆
1 / 22
Terms in this set (22)
trachea
flexible and non-collapsible tube

extends from the cricoid cartilage to the lungs, or the larynx to the thoracic cavity.
the wall of the trachea is composed of
mucosa- respiratory epithelium and submucosal glands
fibro-cartilaginous layer
adventitia (neck) or serosa (thorax)
what is the purpose of the incomplete hyaline cartilage rings of the trachea?
provide structural support- keep airways open during inspiration and expiration
8- sternocephalic mm
9- sternothyroid mm
10- trachea
11- oesophagus
12- external jugular vein
13- common carotid artery, vagosymphathetic trunk
(internal jugular vein) within
Carotid sheath;
Recurrent laryngeal n.- out
with sheath
15- superficial cervical lymph nodes
label 8-15

not 14
Image: 8- sternocephalic mm 9- sternothyroid mm 10- trachea 11- oesophagus 12- external jugular vein 13- common carotid artery, vagosymphathetic trunk (internal jugular vein) within Carotid sheath; Recurrent laryngeal n.- out with sheath 15- superficial cervical lymph nodes
blood supply of the trachea
common carotid artery (neck)
broncheoesophageal artery (thorax)
satellite veins
nerve supply of the trachea
vagus and recurrent laryngeal nerves
sympathetic trunk and middle cervical ganglion
clinical considerations of the trachea
tracheal collapse- due to inherited and acquired degeneration of the cartilages
trachea is smaller in which breeds?
brachiocephalic
boundaries of the thoracic cavity
Cranial: thoracic inlet
Dorsal: thoracic vertebrae and dorsal part of ribs
lateral: ribs and intercostal mm, and costal cartilages
ventral: sternum and transverse thoacis m
Caudal: diaphragm
1= right auricle
2= right ventricle
3- left ventricle
4= left atrium
7= aorta
8= trachea
label (heart)
Image: 1= right auricle 2= right ventricle 3- left ventricle 4= left atrium 7= aorta 8= trachea
2= right ventricle 3= left ventricle 5= right atrium 6= pulmonary trunklabel (heart)The cupula of the diaphragm extends to approx. the 6th rib at the end of expirationThe trachea bifurcates about Twhat in the canine thorax?t5The cupula of the diaphragm extends to approx. which rib at the end of expiration6thwhat is in the carotid sheath?common carotid artery, vasosympathethic trunk7 contents of the thoracic cavitythe lungs, the heart, part of the trachea, the oesophagus, the thymus, the great vessels and nerves, and the thoracic duct and lymph nodespleural sacsa serous membrane consisting of visceral and parietal layer- separated by pleural cavity containing pleural fluid each lung resides within a pleural sacorgans and structures within the mediastinum•The heart (within the pericardial sac) •The trachea •The oesophagus •The thymus (juv.) •The great vessels & nerves* •The thoracic duct and lymph nodesorgans and structures that lie outwith the mediastinumThe lungs (within the pleural sacs) The caudal vena cava (*plus right phrenic nerve caudal to the heart)- visible right lateral view1- diaphragmatic pleura 2- visceral pleura 3- mediastinal pleuralabelvisceral pleuracovers the surface of the lungsparietal pleuralines the medistinum, diaphragm, and thoracic wall