The Excretory System

Write the BLACK Read the RED

WHAT DO YOU KNOW ABOUT THE EXCRETORY SYSTEM?

Follow along on pg. 115 of the workbook

Excretion Waste products (toxic) eliminated from body

Blood balance in our bodies is maintained by : the kidneys, lungs and sweat glands StructureExcreted product LungsCarbon dioxide (CO 2 ) Sweat glandsSweat (water, heat) kidneysUrine (water, salts)

Sweat glands in the skin Glands under surface = excrete sweat up to skin’s surface Helps regulate body temperature ( liquid absorbs heat from body to evapourate- change of state) Sweat = water & waste materials from blood

Antiperspirant or D.O? Antiperspirants = fragrance and chemical compounds that block the pores to stop perspiration. No sweat, no odour. Deodorant = allow release of perspiration, antiseptic agents kill odour-causing bacteria.

Use pg of textbook to help fill in pg. 115 of workbook

Check your answers

Structures of the Urinary System Function KidneysHomeostasis via production of urine Ureterurine from kidneys  bladder BladderStores urine until released- can hold  1 L Urethraurine = bladder  outside

Lab 60 dissect a kidney (if we can get them)

Components of Urine (a solution) 95% of urine is water 5% is solutes (chemicals dissolved in water e.g. urea, uric acid, salts, etc.) If protein, blood, glucose, fats= problem Traces of medication or drugs (see next slide)

How long do drugs stay in your urine? Alcohol days Amphetamines (speed) days Barbiturates (downers) days Cannabis (weed) 7 to 30 days Cocaine days LSD (acid) days MDMA (ecstasy) days Methamphetamine (crystal meth) days Rohypnol (date rape drug) 2 days (maximum)

Urine should be: Clear  dark amber (varies with hydration) Unusual colours can indicate different problems. Usually odourless (except after certain foods e.g. asparagus) Clear. Turbid (cloudy) urine =infections or crystals Neutral. A pH of around L a day

Did you Know? Urine has been used to tan leather, cure bee stings, jellyfish stings, and athlete’s foot In the case of emergency, drinking urine can buy the body a few days before death (you will die faster without liquids than without food)

patches

Pre-lab notes: Indicators Used to test the presence of certain substances E.g. litmus paper = if liquid is acidic (pink), basic (blue) or neutral (no change).

qualitative property- using your senses to observe, not measured e.g. colour quantitative property- using lab procedures to measure e.g. density

Lab 61 components of urine Add the following chart into the lab

Qualitative Observations ColourSmellTurbidity Sample A Sample B Sample C Sample D

Urinalysis Lab DO NOT DRINK ANYTHING AND WASH YOUR HANDS AFTER! Note: ANYTHING that you touch to do this lab gets written down as part of the materials list.

Homework pg. 116 of workbook

Discussion Pg. 197 of textbook Q 18-20

Build a Concept Map Read page 112 in your Toolbox on how to create a Concept Map Using the ALL the words on page 197 to create a BIG concept map for Chapter 6 of your textbook. You can use your notes too.

Chapter 6 study Q = pg

Crash course excretory