TED-Ed Published on 26 Oct 2017
Published on April 1, 2012
Paul Andersen describes the important features of the skeletal system. He starts by comparing and contrasting endoskeletons and exoskeletons. He then explains how the human skeleton provides support, movement, storage, blood production and homeostasis.
Published on Feb 13, 2017
In this video Paul Andersen gives an overview of the human urinary system. The system consist of the kidneys, ureters, bladder, and urethra. The kidneys excrete waste from the blood in urine. He explains how the nephron is responsible for filtration, secretion, and reabsorption of material in the blood. He details all of the elements of the nephron including; the renal corpuscle, the proximal convoluted tubule, Loop of Henle, distal convoluted tubule and the collecting duct. Urine is transported from the kidney to the bladder for storage in the ureters. It then enters the environment through the urethra. The urinary system maintains homeostasis through hormonal control.