Gross Anatomy II Lab 5

Features of respiratory system

Trachea, L and R main bronchi, superior/inferior/middle bronchi, segmental bronchi (10 per lung)

Features of lungs

Apex, base, surfaces, hilum, pulmonary ligament

Pulmonary ligament

Double layer of pleura connecting mediastinal and diaphragmatic subdivisions

Surfaces of the lungs

Costal, mediastinal, diaphragmatic (same as base)

Features of hilum of lung

Main bronchus (posterior)

Pulmonary artery (superior)

Pulmonary veins (anterior, inferior)

Features of left lung

Superior and inferior lobes, oblique fissure

Lingula, cardiac notch

Cardiac impression, groove for the aorta

Features of right lung

Superior, middle, and inferior lobes

Oblique and horizontal fissures

Grooves of the azygos vein and esophagus

External features of heart

Base, apex, anterior surface, diaphragmatic surface, L and R pulmonary surfaces

Coronary sulcus, anterior and posterior interventricular grooves

Coronary sulcus (groove)

Between atria and ventricles, site of coronary sinus

Major blood vessels of heart

R and L coronary arteries (from ascending aorta), coronary sinus (maj. venous return)

Branches of R coronary artery

Right marginal artery (travels with small cardiac vein)

Posterior interventricular artery (travels with middle cardiac vein)

Branches of L coronary artery

Anterior interventricular artery (travels with great cardiac vein)

Circumflex artery - most posterior branch

Coronary sinus

Drains into R atrium, found in coronary sulcus

Receives great, middle, and small cardiac veins

Features of the right atrium

Crista terminalis, pectinate muscles, sinus of venae cavae, fossa ovalis, limbus fossa ovalis, right auricle, openings of venae cavae and coronary sinus

Crista terminalis

Vertical ridge at termination of pectinate muscles on right atrium

Sinus of venae cavae

Smooth-walled region of right atrium, located posterior to crista terminalis

Right auricle

Appendage of right atrium, “earlike,” contains pectinate muscles

Features of right ventricle

Tricuspid valve, papillary muscles, chordae tendinae, moderator band, trabeculae carneae, supraventricular crest, conus arteriosus, pulmonary valve

Tricuspid valve

Right atrioventricular (AV) valve with anterior, posterior, septal cusps

Chordae tendinae

From papillary muscles to cusps of AV valves

Septomarginal trabecula (moderator band)

Within right ventricle, conducts a major branch of the conducting system of the heart

Pulmonary valve features

Semilunar cusps and pulmonary sinuses (anterior, left, right)

Features of left atrium

Pectinate muscles, left auricle, openings of pulmonary veins

Pulmonary veins

Return oxygenated blood from lungs to left atrium of heart - 4 in total

Features of the left ventricle

Bicuspid valve, papillary muscles, chordae tendineae, trabeculae carneae, aortic valve

Mitral/bicuspid/left atrioventricular (AV) valve

Connects left atrium and ventricle, has anterior and posterior cusps

Features of the aortic valve

Semilunar cusps and aortic sinuses (left, right, posterior)