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Human blood contains wastes. Cellular
wastes, dead cells, dead blood cells, ect. So how do they dispose of this
waste?
The blood is constantly piped through the kidneys. Purification occurs here. The kidney is a reddish bean like thing. It is surrounded by fat and connective tissue. The outer portion is called the renal cortex. The inner portion is the renal medulla. Blood is filtered in these structures to create urine. Urine passes through renal pyramids (in the renal medulla) and exits at the tip (renal papilla). The renal papilla has tiny openings(collecting ducts) that allow urine to pass through. Then urine enters the renal pelvis and exits throught the ureter. The functioning unit in the kidnet is called the nephron. It contains a glomerular (Bownan's) capsule that surrounds a glomerulus which together form the renal corpuscle. Attached is a long renal tubule which is divided into four parts; the proximal convoluted tubule, the loop of helen, the distal convoluted tubule, and a collecting duct. Filtration occurs between the Bowman's capsule and the glomerulus. Tiny particles pass from the Bowman's capsule into the glomerulus. From the ureters, urine goes into the bladder to be stored until released through the urethra.. |