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PP 993-998. EXCRETORY SYSTEM. FUNCTION. Every cell in the body produces metabolic waste. The skin, lungs, and kidneys make up this system. SKIN (Integumentary System). Excretes water, salts, small amounts of nitrogenous wastes. Lungs. Excrete water vapor and CO2. URINARY SYSTEM.
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PP 993-998 EXCRETORY SYSTEM
FUNCTION • Every cell in the body produces metabolic waste. • The skin, lungs, and kidneys make up this system.
SKIN (Integumentary System) • Excretes water, salts, small amounts of nitrogenous wastes
Lungs • Excrete water vapor and CO2
URINARY SYSTEM • Formation and excretion of urine • Mostly water to keep wastes dissolved and easier to excrete (nitrogenous waste).
URINARY SYSTEM • Formation and excretion of urine
URINARY SYSTEM • Formation and excretion of urine • Mostly water to keep wastes dissolved and easier to excrete (nitrogenous waste).
Step 1: FILTRATION • blood forced into kidneys to clean out urea (created in liver), toxins, mineral salts, and water to from urine.
Step 2: REABSORPTION • Some substances return to blood to maintain balance (through vena cava/vein)
Step 3: ELIMINATION • Urine passes through the ureters to be stored in bladder until it is secreted through the urethra
URINE • Normally made of urea, water, salt and has a very light yellow color
WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged
WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration
WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys
WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys • Urine will have a high glucose count if the individual is diabetic
WHAT URINE TELLS US • Proteins may leak into the urine if the kidney is damaged • Too dark in color indicates dehydration • Brown color indicates bleeding from the kidneys • Urine will have a high glucose count if the individual is diabetic • Low or no glucose indicates hypoglycemia, which results from too much insulin
Assignments • Class Work: Dig/Exc Review WS • HW: SG # 11-20 and Urinalysis Pre Lab MUST BE DONE IN ORDER TO DO LAB!!