BIO102/ BIO 102 Unit 8 The Urinary System Assignment (answered) / BIO 102 Unit 8 The Urinary System Assignment 1

BIO102 Unit 8 The Urinary System Assignment 1 1. Characterize the roles of each of the parts of the urinary system. (Kidneys, nephrons, ureters, urinary bladder, and urethra) Kidneys: Excretes unwanted substances, such as cellular metabolic waste, excess salts, toxins, and urea, water balance, pH balance, blood pressure regulation, and regulation of RBC production. Nephrons: A nephron is to the urinary system as the neuron is to the nervous system. There are about 1 Million in each kidney. Ureters: The ureters are 2 long and slender muscular tubes that uses peristalsis and gravity to move urine along. They extend from the kidneys. Urinary Bladder: The urinary bladder is a temporary reservoir for urine, and it has many layers. It is lined with mucous membrane, and it has transitional epithelium. The bladder has rugae when it is empty. Urethra: The urethra is the tube that extends from the bladder, and it leads to the outside of the body. 2. Trace the flow of blood through the kidney and describe how blood is filtered in the kidney nephron. Renal artery through arcuate arteries through cortical radiate arteries through Afferent arteriole through Glomerulus through Efferent arteriole through Peritubular capillaries and vasa recta through Arcuate vein through Renal vein through Inferior vena cava.