Humans have three paired major glands: parotid, submandibular, and sublingual. Parotid glands produce 20% of total oral cavity saliva. Submandibular glands produce 70% of oral cavity saliva. Sublingual glands produce 5% of oral cavity saliva
CSF is a clear fluid surrounding brain and spinal cord in vertebrates. Produced by choroid plexus in brain ventricles, about 500 mL daily. Contains 125-150 mL at any time, with higher volume in children. Nearly protein-free, with lower chloride and higher sodium levels
Bone marrow is semi-solid tissue found in spongy bone portions. Produces approximately 500 billion blood cells daily. Comprises hematopoietic cells, marrow adipose tissue, and supportive stromal cells. Makes up 5% of total body mass in healthy adults
Cerebral circulation delivers oxygenated blood to brain through arteries and veins. Adult cerebral blood flow is 750 ml/min, about 15% of cardiac output. Blood vessels undergo postnatal maturation for brain function
Ribs form the axial skeleton and protect vital organs in the thorax. Humans have 24 ribs in 12 pairs, with 1 in 500 having cervical ribs. Ribs connect to vertebrae at costovertebral joints and sternum via costal cartilage. Ribs consist of head, neck, body, tubercle, and angle
New IASLC map proposed in 2009 to reconcile Naruke and MD-ATS maps. Supraclavicular nodes located from cricoid to clavicles. Upper paratracheal nodes extend from manubrium to aortic arch. Pre-vascular nodes located anterior to vessels, pre-vertebral behind esophagus. Lower paratracheal nodes extend from azygos vein to trachea