6-1_CFLAEAS493558_U03L04
of 17
-
Upload
phine-tabajonda -
Category
Documents
-
view
215 -
download
0
Transcript of 6-1_CFLAEAS493558_U03L04
-
8/11/2019 6-1_CFLAEAS493558_U03L04
1/17
Unit 3 Lesson 4 The Digestive and Excretory Systems
Copyright Houghton Mifflin Harcourt Publishing Company
-
8/11/2019 6-1_CFLAEAS493558_U03L04
2/17
Unit 3Lesson 4 The Digestive and Excretory Systems
Florida Benchmarks
Copyright Houghton Mifflin Harcourt Publishing Company
SC.6.L.14.5Identify and investigate the generalfunctions of the major systems of the human body(digestive, respiratory, circulatory, reproductive,
excretory, immune, nervous, and musculoskeletal)and describe ways these systems interact witheach other to maintain homeostasis.
HE.6.C.1.8Explain how body systems are
impacted by hereditary factors and infectiousagents.
-
8/11/2019 6-1_CFLAEAS493558_U03L04
3/17
You Are What You Eat!
Copyright Houghton Mifflin Harcourt Publishing Company
What is the digestive system?
Cells use nutrients from food for energy, growth,
maintenance, and repair.
The digestive systembreaks down food intonutrients that can be used as building materialsthat provide energy for cells.
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
4/17
What are the two types of digestion?
Mechanical digestion is the breaking, crushing,and mashing of food.
Chemical digestion occurs when large molecules offood are broken down so that they can passthrough the bloodstream.
An enzymeis a chemical that breaks down large
molecules into smaller molecules.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
5/17
Chew on This
Copyright Houghton Mifflin Harcourt Publishing Company
What are the parts of the digestivesystem?
The mouth is where mechanical and chemical
digestion begins. Salivahelps to break down food.
Food moves through the throat into a long tubecalled the esophagus.
Muscle contractions calledperistalsismove thefood to the stomach.
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
6/17
What are the parts of the digestive
system? The stomachis a muscular bag that crushes food
and contains acids and enzymes for killingbacteria and breaking down proteins.
Chymeis the mushy mix of food that passes fromthe stomach to the small intestines.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
7/17
What are the parts of the digestive
system? The small intestineis a muscular tube where
most chemical digestion takes place and mostnutrients are absorbed.
In the large intestine, water and nutrients areabsorbed, leaving waste.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
8/17
What are the parts of the digestive
system? Identify and describe the parts of the digestive
system.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
9/17
Where are nutrients absorbed?
The pancreasmakes fluids that break downproteins, carbohydrates, fats, and nucleic acids.
The livermakes and releases a mixture called bilethat is stored in the gall bladder.
Bile breaks up large fat droplets.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
10/17
Where are nutrients absorbed?
The walls of the small intestine have many foldsthat increase the surface area, allowing moreroom for nutrients to be absorbed.
Each fold has villi, which are covered withmicrovilli, that absorb more nutrients.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
11/17
Where are nutrients absorbed?
The large intestine removes water, absorbsvitamins, and turns food into waste called feces.
Bacteria live in the large intestine to help breakdown foods the body cannot use or digest.
The rectumis the end of the large intestine thatstores feces until they can be expelled by the anus.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
12/17
Toxic Waste!
Copyright Houghton Mifflin Harcourt Publishing Company
What are the functions of the excretorysystem?
Waste in the body would become toxic without a
method to eliminate it.
The excretory systemeliminates cellular wastesfrom the body through the lungs, skin, kidneys,and digestive system.
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
13/17
What are the functions of the excretory
system? Excess salts are released through the skin as you
sweat.
The lungs release carbon dioxide and water as youexhale.
The kidneys and the digestive system removecellular waste.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
14/17
Cleanup Crew
Copyright Houghton Mifflin Harcourt Publishing Company
What organs are in the urinary system?
A kidneyis one of a pair of organs that removewaste from the blood.
Nephronsare structures in the kidneys wherefluid is filtered from the blood.
Water and wastes filtered from the blood form aliquid called urine.
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
15/17
What organs are in the urinary system?
Urine travels from the kidneys, through theureters, to the bladder.
The bladder is a saclike organ that stores urine.
Urine exits the bladder through a tube called theurethra.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
16/17
What organs are in the urinary system?
How does a kidney work to eliminate wastes fromthe blood?
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
-
8/11/2019 6-1_CFLAEAS493558_U03L04
17/17
How does the urinary system maintain
homeostasis? Cells need a certain level of salt and water to
maintain homeostasis.
Chemical messengers calledhormonessignal thekidneys to filter more or less water and salt asneeded.
Copyright Houghton Mifflin Harcourt Publishing Company
Unit 3Lesson 4 The Digestive and Excretory Systems
