Anatomy Flashcards
What is the first structure in the lower respiratory tract?
Trachea
What happens at the level of the C6 vertebra?
Larynx becomes trachea and pharynx becomes oesophagus
Where can the trachea be palpated?
Jugular notch of the manubrium
What is anterior to tracheal cartilages 2-4?
Isthmus of the thyroid gland
What do the pleura secrete and why?
Pleural fluid to lubricate and provide surface tension
Where is the pleural fluid found?
In the pleural cavity
Where do the lungs develop from?
Mediastinum and out
What does each lobar bronchi supply with air?
A lung lobe
What do each segmental bronchi supply?
A bronchopulmonary segment
Each lung has how many bronchopulmonary segments?
10
What are ribs 1-7 known as and where do they attach?
True ribs- costal cartilage to sternum
What are ribs 8-10 known as and where do they attach?
False ribs- costal cartilage above to sternum
What are ribs 11-12 known as and where do they attach?
Floating ribs- no attachment to sternum
What is the common cartilage bar which attaches the false ribs to the sternum known as?
Costal margin
Where does the head of the rib articulate with?
Body of vertebrae
Where does the rib tubercle articulate with?
Transverse process of vertebra
What is the name of the joint which connects the sternum to the cartilage and what type of joint is it?
Sternocostal joints (synovial)
What is the name of the joint which connects the rib end to the cartilage?
Costochondral
What is the name of the joints which connect the ribs to the vertebrae?
Costovertebral
What are the three layers of skeletal muscle located between the ribs and in intercostal spaces?
External, internal and innermost
How do the intercostal muscles make the chest wall expand?
Pull ribs upwards and outwards
How many pairs of intercostal spaces are there?
11
Each intercostal space contains a neurovascular bundle. Where specifically are these found?
Between internal and innermost intercostal muscles
From superior to inferior, what order do the contents of the neurovascular bundle run in?
Vein, artery, nerve (VAN)
What is the nerve supply to the intercostal spaces?
Intercostal nerve- anterior ramus of a spinal nerve
What is the arterial supply and venous drainage of the intercostal spaces POSTERIORLY?
Arterial supply- thoracic aorta
Venous drainage- azygous vein
What is the arterial supply and venous drainage of the intercostal spaces ANTERIORLY?
Arterial supply- internal thoracic artery
Venous drainage- internal thoracic vein
What do the intercostal arteries supply?
Chest wall
Where do intercostal arteries arise from?
Bilaterally from the thoracic aorta
What do the bronchial arteries supply and where do they arise from?
Supply lung tissue, arise from the anterior surface of the thoracic aorta
The muscular part of the diaphragm attaches to where?
Sternum, lower 6 ribs and costal cartilages, L1-3 vertebrae
The muscular part of the diaphragm is supplied by what?
Phrenic nerve- C3, 4, 5 (anterior rami)
Where are the phrenic nerves found in the neck?
Anterior surface of the scalenus anterior muscle
Where are the phrenic nerves found in the chest?
Descending over the lateral aspects of the heart
What does the phrenic nerve supply to the diaphragm and fibrous pericardium?
Somatic sensory and sympathetic axons
What does the phrenic nerve supply just to the diaphragm?
Somatic motor axons
Lymph from the lateral quadrants of the breast drain where?
Unilaterally to axillary nodes
Lymph from medial quadrants of the breast drain where?
Bilaterally to parasternal nodes
Where is the sternal angle?
At the level of rib 2
What vein is found in the delto-pectoral groove?
Cephalic vein
What nerve supplies the serratus anterior? If this is damaged what can it cause?
Long thoracic nerve, damage can cause a winged scapula
Where does the pectoralis minor attach?
Between coracoid process of scapula and ribs 3-5