2/18/15

Starter:

2/18/15

171 172

Application/Connection:

 Excretory System Ws Tu

Excretory System Notes and Ws Excretory System Notes and Ws

Practice:

Glue notes hereExit:Explain some of the ways the body rids itself of waste.

Mouth

esophagus

stomach

Small intestine

Large intestine

Anus

Breaking down of food into simple substances

February 18, 2015

AGENDA Objective 7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive,

integumentary, nervous, and endocrine systems by completing a skeletal system worksheet

1. Starter2. Excretory System Notes3. Excretory System Ws

Table of Contents

Date Lecture/ Activity/ Lab Page

2/17 Digestive System Notes and Ws 169-1702/18 Exretory System Notes and Ws 171-172

The Excretory System

Excretory System• Why do our bodies need to filter

waste from the body?

– Maintain homeostasis– Removal of harmful materials– Removal of excess fluids, chemicals,

minerals, vitamins, salts, and other wastes from the blood

Organs of the Excretory System

• Kidneys = filter blood that has collected wastes from cells

Organs of the Excretory System

• Kidneys = filter blood that has collected wastes from cells– Nephrons = filters

inside the kidneys– Produce urine

(sterile waste fluid, 96% water)

Organs of the Excretory System

• Ureters = tubes that lead from each kidney to bladder

Organs of the Excretory System

• Urinary bladder = muscular organ that holds urine

Organs of the Excretory System

• Urethra = tube that carries urine from the bladder out of the body

Where is urine stored until the body is ready to eliminate it?

1. Kidneys2. Ureters3. Bladder4. Urethra

Functions of Excretory System

• Rids blood of wastes (urea)

Functions of Excretory System

• Controls blood volume by

removing extra water produced by cells

Functions of Excretory System

• Balances salts and water so cells can function properly

Which is not a function of the excretory system?

1. Removes wastes from the blood

2. Removes excess water from the blood

3. Removes carbon dioxide from the blood

4. Removes excess salt from the blood

Other Excretory Organs

• Skin = releases perspiration (water and salts) to cool off the body

Other Excretory Organs

• Lungs = release carbon dioxide from the body

 

2/18/15

Starter:

2/18/15

171 172

Application/Connection:

 Excretory System Ws Tu

Excretory System Notes and Ws Excretory System Notes and Ws

Practice:

Glue notes hereExit:Explain some of the ways the body rids itself of waste.