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20 Cards in this Set
- Front
- Back
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The largest lymphatic vessel in the body is |
Thoracic ducts |
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Why does thoracic duct have a beaded appearance |
Because of numerous valve |
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Area of drainage of thoracic duct |
All area of the body except right upper quadrant |
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Extent of thoracic duct |
From the cisterina chyli at the lower border of T12 to the junction btw left internal jugular vein and left subclavian vein at the root of the neck |
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Measurement of thoracic duct |
Length-45cm (18 inches) Width- 5mm at each end but narrow at the middle |
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Course of thoracic duct |
From cisterna chyli at T12 through aortic orifice and extend Upwards in the posterior medistinum right to the midline of vertebral bodies, at T5 it crosses to the left into the superior mediastinum along the left border of esophagus to reach the root of the neck which it arches lateral in front of vertebral system to ends at junction between the left internal jugular vein and left subclavian vein. |
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Tributaries of thoracic duct in abdomen |
Efferent 6 lower intercoastal lymph node |
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Location of cisterna chyli |
In front of L1/L2 vertebrae |
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Tributaries of thoracic duct in abdomen |
1. Pair of ascending lymph trunk which drains the upper lumbar region para-aortic lymph node. 2. Pair of descending lymph trunk which drains the posterior intercoastal lymph of the upper 6 space 3. Lymph vessel for posterior mediastinal lymph node |
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Tributaries of thoracic duct in the neck |
1. Left jugular lymph node draining the neck 2. Left subclavian lymph node draining the upper limb 3. Left bronchomediastinal trunk |
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Clinical significance of thoracic duct |
Injury to thoracic duct Obstruction of thoracic duct |
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Position of thoracic duct in neck |
Posterior to carotid sheath and content Anterior to vertebral artery scalane anterior muscle, phrenic nerve and thyrocervical trunk |
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What drains the right upper quadrant |
Right lymphatic duct |
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When does maturation of thymus occur |
At puberty |
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Location of thymus |
BTW thyroid and heart, posterior to sternum, anterior to trachea and vertebral column, BTW fascia of the lungs |
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What part of mediastinum is thymus located |
Superior mediastinum |
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Weight of thymus |
25grams |
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What does thymus secrete |
Thymosine |
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Blood supply of thymus |
Inferior thyroid artery and vein |
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What occurs at thymus |
maturation of T cells take place at thymus and mature T cells are stored at lymph of (relay station) |
