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Urinary System Functions of the Urinary System elimination of _______________________________________ o ______________________________________ (byproducts of chemical reactions that are no longer useful such as ammonia, urea, uric acid, creatinine) control the volume and composition of body fluids o __________________________________________________ blood volume is closely associated with the salt balance of the body (____________________________________ ______________________________________________ _____________________________________________) the kidneys are involved in regulating blood pressure and also maintain appropriate levels of certain ions in the blood o __________________________________________________ the kidneys monitor and control blood pH through the excretion and reabsorption of certain ions ________________________________________________________ o principal job is the removal of urea and the regulation of water in the bloodstream Biology 12 - Human Biology - Urinary System Paul Plut, Jessica Wan 1 Waste Products ______________________ o end product of __________________ _________________ _____________________________in body cells o water soluble o primary end product of the urinary system o _______________________________________ ________________________ o end product of the deamination of amino groups o ______________________________________ o converted to urea in the liver in land mammals _________________________ o end product from creatinine phosphate in muscle metabolism Structures of the Urinary System kidneys o reddish brown organs o ______________________________________ (4 inches long, 2 inches wide, 1 inch thick in an average sized adult) o located on either side of the spinal column, anchored against the dorsal (back) body wall by connective tissue o ___________________________________________________ ___________________________________________________ renal vein Biology 12 - Human Biology - Urinary System Paul Plut, Jessica Wan 2 o carries blood from the kidneys back to the heart renal artery o carries blood into the kidney ureter o muscular tube o ___________________________________________________ ___________________________________________________ urinary bladder o urine storage, can hold up to 600 to 1000 mL of urine o ___________________________________________ stretch receptors indicate when it is full, signal notifies the brain resulting in the desire to urinate urethra o tube that connects the urinary bladder to the outside Biology 12 - Human Biology - Urinary System Paul Plut, Jessica Wan 3 The Components of the Urinary System Biology 12 - Human Biology - Urinary System Paul Plut, Jessica Wan 4 Urinary System Concept Map After this introductory lesson to the urinary system, working in groups of 4, you and your group mates will create a concept map as an overview of the system. A list of terms is given that you must incorporate into your assignment but feel free to add terms as needed. You will be required to write in words on the connecting lines, the relationship that exists between the two concepts that you linked together. A single concept can have many other concepts linked to it. Be sure to write down the relationship on the line for full marks. You will be given post-it notes to use as nodes where you write down the main concepts. This way you can move the nodes around until you are satisfied with their position and the corresponding links. After you have completed your concept map, all groups members must participate in a short 2-minute presentation describing your concept map and the reasoning behind the grouping of the concepts as seen on the map. Refer to the rubric on the back of this handout for marking guidelines and to make sure you’ve fulfilled all the criteria. The terms that must be included are: excretion kidneys metabolic wastes nitrogenous wastes ammonia urea creatinine renal vein renal artery ureter urinary bladder urethra urine Biology 12 - Human Biology - Urinary System Paul Plut, Jessica Wan 5