Anatomy year 1 Flashcards
What are the following labels on this cadaver?
What is more posterior, the oesophagus or trachea?
Oesophagus
What are the following labels?
What are the folliwing labels?
What are the following labels?
What are the following labels?
What are the following labels?
What are the following labels?
What are are subdivisions of the mediastinum?
At what level are the superior and middle/anterior/posterior mediastinum seperated?
The sternal angle, the line reaches back to T4/T5.
What is the mediastinum?
The thoracic mediastinum is the compartment that runs the length of the thoracic cavity between the pleural sacs of the lungs
What is located in the posterior mediastinum?
The oesophagus, descending aorta, thoracic duct, azygos veins, vagus nerves and sympathetic chains.
What are the different types of pericardium?
Tough outer layer= fibrous pericardium, attaches to diaphragm
2 layered inner layer= parietal lines inner surface of fibrous while visceral covers outer surface of heart
What is the pericardial cavity?
The potential space between the parietal and the visceral pericardium, contains fluid
What/where is the transvere sinus in the pericardium?
The transverse pericardial sinus is the transverse communication between the left and right parts of the pericardial space proper behind the two outflow arteries of the heart.
It is posterior to the intrapericardial parts of the pulmonary trunk and ascending aorta and anterior to the superior vena cava
What are the following labels?
What are the following labels?
What structures carry oxygenated and deoxygenated blood to and from the heart?
What are the following labels?
What order does blood flow through the heart?
Superior and inferior vena cava -> right atrium -> tricuspid valve -> right ventricle -> pulomary valve -> pulmonary artery -> pulomary vein -> left atrium -> mitral valve -> left ventricle -> aortic valve -> aorta
What are the musculari pectinati?
The pectinate muscles (musculi pectinati) are parallel muscular ridges in the wall of the right atrium of the heart.
What is the crista terminalis?
The crista terminalis (terminal crest) is a C-shaped ridge located in the endocardial aspect of the right atrium of the heart
What are the following features of the right atrium of the heart?
What is the fossa ovalis and where is it?
The fossa ovalis is a depressed structure, of varying shapes, located in the inferior aspect of the right interatrial septum. It is a remnant of an interatrial opening, the foramen ovale, which has a significant role in fetal circulation
What is the fossa ovalis and where is it?
The fossa ovalis is a depressed structure, of varying shapes, located in the inferior aspect of the right interatrial septum. It is a remnant of an interatrial opening, the foramen ovale, which has a significant role in fetal circulation
What is the fossa ovalis and where is it?
The fossa ovalis is a depressed structure, of varying shapes, located in the inferior aspect of the right interatrial septum. It is a remnant of an interatrial opening, the foramen ovale, which has a significant role in fetal circulation
What are the following labels?
What are the following labels?
What is the coronary sinus?
The coronary sinus is the major venous tributary of the greater cardiac venous system; it is responsible for draining most of the deoxygenated blood leaving the myocardium
What are the chordae tendineae?
The chordae tendinae (CT) are strong, fibrous connections between the valve leaflets and the papillary muscles
What are the chordae tendineae?
The chordae tendinae (CT) are strong, fibrous connections between the valve leaflets and the papillary muscles
What are the papillary muscles?
The papillary muscles of the heart are pillar-like muscles seen within the cavity of the ventricles
What are the trabeculae carneae?
The trabeculae carneae are rounded or irregular muscular columns which project from the inner surface of the right and left ventricle of the heart.
What are the missing labels?
What are the missing labels?
What are the 4 heart valaves and how many cusps do they have?
Where and what is the left auricular appendage?
Your left atrial appendage is a small pouch, shaped like a windsock, found in the top left of your heart
Seen below as LAA
How do the right and left ventricles differ from one another?
What are the following arteries?
What does the left coronary artery supply and split into?
The left main coronary artery supplies blood to the left side of the heart muscle. The left main coronary divides into branches:
The left anterior descending artery branches off the left coronary artery and supplies blood to the front of the left side of the heart.
The circumflex artery branches off the left coronary artery and encircles the heart muscle. This artery supplies blood to the outer side and back of the heart.
What does the right coronary artery supply and split into?
The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes.
The right coronary artery divides into smaller branches, including the right posterior interventricular artery and the right marginal artery
Where is the position of the SA node?
What are the missing labels?
Descending artery= interventricular artery
What are the missing labels?
What are the missing labels?
Where is the coronary sinus located?
It arises along the posterior aspect of the heart between the left atrium and the left ventricle
What are the aortic sinuses?
An aortic sinus is one of the anatomic dilatations of the ascending aorta, which occurs just above the aortic valve. Coloured stars below
What are the missing labels?
What artery is this?
Brachiocephalic trunk
What artery is this?
Right subclavian
What artery is this?
Right common carotid
What artery is this?
Left external carotid
What artery is this?
Left internal carotid
What vein is this?
Left brachiocephalic
What vein is this?
Left subclavian
What vein is this?
Left internal jugular
What vein is this?
Left external jugular
What is the midaxillary line?
The midaxillary line is an imaginary landmark line that runs through an individual’s torso, separating the body into its anterior and posterior
What are the following imaginary lines?
Why are the midclavicular and midaxillary line important when thinking about pleural cavities?
They aid in visualising where the pleural cavities lie within a patient. The midaxillary line is used to insert a pleural tap (thoracentesis), to remove air or fluid from the pleural cavity.
What are the pleural cavities?
The space enclosed by the pleura, which is a thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity.
What is the function of the pleural cavities?
They provide surface tension and cohesion to keep the lung surfaces in contact with the thoracic wall.
What are the pleural recesses?
The lungs do not completely fill the pleural cavity, creating two pleural recesses
Known as costodiaphragmatic recesses
The left costomediastinal recess is larger than the right, why?
Due to the presence of the cardiac notch in the left lung, which is more pronounced than the notch in the parietal pleural surrounding the left lung.
What are the following labels?
What is the name of the muscle forming the posterior wall of the trachea?
Trachealis muscle
What are the differences between the left and right main bronchi?
Right main bronchus – wider, shorter and more vertical than the left main bronchus
Left main bronchus – thin, long and more horizontal than right main bronchus.
What do the main bronchi divide into?
Right main bronchus – 3 lobar bronchi
Left main bronchus – 2 lobar bronchi
What prevents the alveoli from collapsing?
They are coated in a thin film of pulmonary surfactant
In which part of the bronchial tree does the function change from the passage of air to gas exchange?
At the respiratory bronchioles
What are the missing labels on this lung?
What are the missing labels on these lungs?
What features can help identify a left and right lung?
Left lung – lingual and cardiac notch
Right lung – Middle lobe and horizontal fissure
What is the hilum of the lung?
The hilum of the lung is found on the medial aspect of each lung, and it is the only site of entrance or exit of structures associated with the lungs.
What are the missing labels on the lung?
What structures pass through the hilum of the lung?
Bronchi, pulmonary arteries, pulomary veins, bronchial arteries and veins, lymph vessels, efferent and afferent nerves.
(Most may not be seen on specimens)
What is the pulmonary ligament?
The ligament forms a barrier between the anterior and posterior parts of the mediastinal portion of the pleural cavity below the root of the lung
What are the missing labels?
On what lung would impressions from the following structures be found?
Cardiac= both, mainly left
Azygous vein= right
Thoracic aorta= left
Oesophagus= both
Arch of aorta= left
Inferior vena cava= right
What are the following grooves for on the lungs?
Which landmarks divide the mediastinum into the superior and inferior mediastinum?
Sternal angle and the intervertebral disc between T4 & T5
What are the following labels?
What structures are found in the superior mediastinum?
Oesophagus, trachea, phrenic nerves
What structures are found in the middle mediastinum?
Heart, ascending aorta, trachea and other great vessels
What structures are found in the posterior mediastinum?
Thoracic aorta, azygous vein, main bronchus, oesophagus
What is the pleura and what are the layers of the pleura?
A thin layer of tissue that covers the lungs and lines the interior wall of the chest cavity
The outer layer is called the parietal pleura and attaches to the chest wall. The inner layer is called the visceral pleura and covers the lungs, blood vessels, nerves, and bronchi.
What is the innervation to the costal parietal pleura?
The costal pleura is the pleural portion covering the inner surfaces of the rib cage
INNERVATION= intercostal nerves
What does the phrenic nerve innervate?
The mediastinal pleura and most of the diaphragmatic pleura, as well as the diaphragm
Which structures of the thorax does the vagus nerve innervate?
Parasympathetic innervation to the lungs and the heart
The vagus nerve passes posterior to which structure of the respiratory system?
It passes posterior to the root of the lung
What are the missing labels?
What are the 4 areas of parietal pleura?
The parietal pleura is split into 4 areas- costal; comes into contact with the thoracic cage with the ribs and intercostal spaces. The mediastinal area comes in contact with mediastinum. Diaphragmatic part covers base of lung. The cervical part lines domed apex of lung.
What are the two pleural cavities seperated by?
The mediastinum
How many ribs are there and what are the different types of ribs?
Ribs 1 – 7 (‘true ribs’) articulate directly with the sternum via their costal cartilage.
Ribs 8 – 10 (‘false ribs’) indirectly articulate with the sternum, as their costal cartilages connect with the seventh costal cartilage; by the costochondral joint
Ribs 11 and 12 (‘floating ribs) do not articulate with the sternum.
ALSO
Get atypical and typical ribs-
Typical: Ribs 3 – 9 (share common features)
Atypical: Ribs 1, 2, 10, 11 and 12 (each have their own distinctive features)
What is this part of a typical rib?
Head
What is this part of a typical rib?
Neck
What is this part of a typical rib? (posterior view)
Tubercle
What is this part of a typical rib? (posterior view)
Angle
What is this part of a typical rib?
Subcostal groove
What part of the first rib is this?
Scalene tubercle
What part of the first rib is this? (posterior view)
Tubercle
What part of the first rib is this?
Articular facet on head of rib
What part of the first rib is this?
Groove for subclavian artery
What part of the first rib is this?
Groove for subclavian vein
What muscle attaches to the scalene tubercle of the first rib?
Scalenus anterior
What are the missing labels?
What are the following missing labels?
- Which ribs articulate with the sternum at the sternal angle?
2nd ribs
- What vertebral level is indicated by the sternal angle?
T4/T5
- What other anatomical landmarks are located at the sternal angle?
T4/T5
Junction between ascending aorta and arch of the aorta
Junction between the arch of the aorta and decending aorta
Bifurcation of trachea
What are these joints?
Costo-transvere joints
What are the two costovertebral joints?
Costotransverse joint Joints of Heads of Ribs
What are the missing labels?
What are the missing labels?
What are the missing labels?
What do the following actions of the ribs do to the thorax?
Bucket handle motion of ribs
Pump handle action of sternum
Inferior movement of diaphragm
What articulates with the manubrium of the sternum?
Clavicle, cartilages of 1st ribs, part of the cartillages of 2nd ribs
What articulate with the body of the sternum?
Cartilages of Ribs 2-7 (and 8-10 indirectly)
What are the different parts of the sternum?
What are the missing labels?
What is the diaphragm?
The thoracic diaphragm is a sheet of skeletal muscle that is critical for the process of respiration – particularly inhalation/ inspiration. It also serves as the anatomical boundary separating the thorax from the abdomen
What are the missing labels?
What is the central tendon of the diaphragm?
The central tendon of the diaphragm is a thin but strong aponeurosis situated slightly anterior to the vault formed by the muscle
During inspiration, the diaphragm contracts, causing the central tendon to be drawn inferiorly which partially flattens the domes bilaterally
What are the crura of the diaphragm?
The crus of diaphragm (pl. crura), refers to one of two tendinous structures that extends below the diaphragm to the vertebral column
What are the missing labels?
At what vertebral level do the vena cava, aorta and oesophagus pass through the diagragm?
vena cava= T8
aorta (aortic hiatus)= T12
oesophagus= T10
Where are the phrenic nerves located in the abdomen?
What are the root values for the phrenic nerve?
C3,4,5 (keeps the diaphragm alive!)
What information is carried to/from the diaphragm in the phrenic nerve?
All motor information. Sensory information for the central parts of the diaphragm.
What nerves innervate the diaphragm?
Phrenic
The peripheral parts of the diaphragm receive sensory innervation from lower intercostal and subcostal nerves.
What are the 3 layers of intercostal muscles?
External intercostal
Internal intercostal
Innermost intercostal