Anatomy, physiology and hygiene for high schools . a glo-merulus and tubule, a, artery briuging blood topart; b, capillary briuging bloodto glomerulus; h, vessel continu-ing with blood to tubule; c, vein;t, tubule; G, Malpighian capsuleand glomemlus. 200 PHYSIOLOGY AND HYGIENE epithelial cells which lines the closed end of the tubule sur-rounding the glomerulus. Through these thin layers of cells the waste substances pass intothe tubules. Below the capsules the bloodcapillaries run in a networkabout the tubules, and fromthese lower capillaries the ureais separated into the tubules,just as is t
Anatomy, physiology and hygiene for high schools . a glo-merulus and tubule, a, artery briuging blood topart; b, capillary briuging bloodto glomerulus; h, vessel continu-ing with blood to tubule; c, vein;t, tubule; G, Malpighian capsuleand glomemlus. 200 PHYSIOLOGY AND HYGIENE epithelial cells which lines the closed end of the tubule sur-rounding the glomerulus. Through these thin layers of cells the waste substances pass intothe tubules. Below the capsules the bloodcapillaries run in a networkabout the tubules, and fromthese lower capillaries the ureais separated into the tubules,just as is the water these waste prod-ucts are borne along the tu-bules to the pelvis of thekidney. The separation of these prod-ucts is due to the specific actionof the living cells which line thetubule. These waste substancesare taken from the blood,while other useful substances,as albumin, are left behind. Urine. The amber-coloredliquid which is thus formed by the separation of wastematerials from the blood by the kidneys is called The kidneys and bladder. X, X, ureters. III. EXCRETION BY THE SKIN The skin is made up of two layers. The outer layer, theepidermis (Greek ejn, upon, and derma, skin ) or cuticle,is formed of several strata of cells. The inner stratum con-sists of columnar cells, over this are several layers of roundcells, and over these two strata are several layers of flat-tened cells, which, as you approach the surface, become merescales. The outer stratum consists of dead cells which have WASTE AND EXCRETION 201
Size: 1221px × 2046px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectphysiology
