Ch. 3Lesson 3

What are the digestive &

urinary systems?

job of digestion

•break down food small materials

Path of digestion

1. mouth• chew food using teeth (adults = 32)• salivary glands-moisten & digest

food• tongue- moves food & has taste buds

Tongue pushes food down the digestive system

epiglottis•flap that covers windpipe when you swallow

2. esophagus•tube that carries food stomach

•moves food down by squeezing rings of muscles

3. stomach•walls covered w/ protective lining of mucus

4. small intestine•pancreas & liver

send chemicals here

•covered w/ villi-–tiny finger shaped structures

–give more surface area to absorb food

villi in small

intestine

5. large intestine (colon)

•has helpful bacteria- make vitamins & keep out disease causing bacteria

•takes water & salts from wastes YouTube video-Where Did I Go-Path of Digestion

Sheppard's Software Digestion

http://www.sheppardsoftware.com/health/anatomy/digestion/digestion_tutorial.htm

Urinary System

includes:

1. kidneys•pair of organs

that remove water, salt & wastes from blood

•regulate & control level of salts & water in blood

2. urinary bladder2. urinary bladder

•stores urine (mix of wastes & water) until ready to leave body

3. lungs

•take in oxygen & remove carbon dioxide

4. sweat glands• release

extra water, salt & wastes as sweat

Time to review

urinary bladderurinary bladder

•stores urine (mix of wastes & water) until ready to leave body

large intestine (colon)• has helpful

bacteria- make vitamins & keep out disease causing bacteria

• takes water & salts from wastes YouTube video-Where Did I Go-Path of Digestion

sweat glands• release

extra water, salt & wastes as sweat

job of digestion

•break down food small materials

lungs•take in oxygen & remove carbon dioxide

pushes food pushes food down the digestive systemdown the digestive system

tongue

stomach•walls covered w/ protective lining of mucus

mouth•digestion begins here

kidneys•pair of organs

that remove water, salt & wastes from blood

•regulate & control level of salts & water in blood

epiglottis•flap that covers windpipe when you swallow

esophagus•tube that carries food stomach

•moves food down by squeezing rings of muscles