Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . lung is divided into two and the right into three lung is attached on its inner aspect to the wall of the pleural cavity, at the root, where the blood-vessels (pulmonary arteries and veins), bronchi, lymphatics, and nerves enter and leave its substance. The terminal branches of the bronchi end in irregular passages, from the sides of which go off the air-sacs. The blood in these capillaries is thus only separated from the air in the air-sacs by the ligh
Health knowledge : a thorough and concise knowledge of the prevention, causes, and treatments of disease, simplified for home use . lung is divided into two and the right into three lung is attached on its inner aspect to the wall of the pleural cavity, at the root, where the blood-vessels (pulmonary arteries and veins), bronchi, lymphatics, and nerves enter and leave its substance. The terminal branches of the bronchi end in irregular passages, from the sides of which go off the air-sacs. The blood in these capillaries is thus only separated from the air in the air-sacs by the light framework of thewalls of the capillaries. THE URINARY SYSTEM The urinary system comprisesthe kidneys, which secrete theurine; the ureters, a pair oftubes along which the urinepasses from the kidneys to thebladder; the bladder, a reser-voir for the urine, situated inthe pelvis; and the urethra, atube which conveys the urinefrom the bladder. The Kidneys.—The kidneyhas a bean-shaped form, hav-ing a convex outer border anda concave inner border, withsomewhat bulging extrem-The Urinary Organs. itics, while the color is a deep. THE UKINARY SYSTEM 911 brownish red. The average length is rather over four inches,the breadth about two inches, and the thickness rather over oneinch, the weight varying usually from about four to six is a fissure in the concave inner border, termed the hilum,at which the ureter, the branches of the renal vein and artery,the lymphatics, and the nerves enter and leave the substance ofthe kidne}^ The kidneys are situated in the upper part of the back of theabdominal cavity, one on each side of the vertebral column, usu-ally above the level of the last rib. The posterior surface of thekidney is in relation above with the diaphragm, on the outerside with the abdomen. The kidney is in front of the transverseprocesses of the last thoracic and the first three lumbar vertebrae. A tough fibrous coat, the capsule, envelops the exterior of thekidney, an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmedicin, bookyear1920
