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Life Science
Unit Overview:
Chapter 1 – Structure of Living Things
•Lesson 1 – Cells
•Lesson 2 – From Cells to Organisms
•Lesson 3 – Diversity of Organisms
Chapter 2 – Plant Structures and Functions
•Lesson 1 – Vascular Plants
•Lesson 2 – Plant Transport Systems
•Lesson 3 – Photosynthesis and Respiration
Chapter 3 – Human Body Systems
•Lesson 1 – The Human Body
•Lesson 2 – The Digestive System
•Lesson 3 The Respiratory System
•Lesson 4 – The Circulatory System
•Lesson 5 – The Excretory System
The Circulatory System
Lesson Overview:
1) What do we already know? (The Heart)
2) Vocabulary
3) Drawings
4) Main Ideas
5) Review
Human Body Systems: Lesson 4
Page 1
The Circulatory System:
What do we already know?
BrainPOP Teaser
1) How do the diaphragm and lungs work
together?
a) The diaphragm helps us inhale and exhale
air into and out of the lungs.
2) Where does gas exchange take place?
a) In the alveoli
Human Body Systems: Lesson 4
Page 2
The Circulatory System: Vocabulary Part I
1) heart: an organ that constantly pumps blood
throughout the body.
2) artery: carries blood mixed with oxygen
(oxygen rich blood) AWAY from the heart.
3) vein: carries blood mixed with carbon
dioxide (oxygen poor blood) BACK to the
heart.
4) capillary: smallest blood vessel with very
thin walls.
Human Body Systems: Lesson 4
Page 3
The Circulatory System: Drawings (pg. 145)
Human Body Systems: Lesson 4
Page 4
The Circulatory System: Drawings (pg. 147)
You will need to be able to label this on the test.
Human Body Systems: Lesson 4
Page 5
The Circulatory System: Drawings (pg. 150)
Human Body Systems: Lesson 4
Page 6
The Circulatory System: Main Ideas
1) How are materials transported through your body?
(pg. 144-145)
a) – First, blood from your heart is pumped into your lungs
via arteries. Arteries carry blood rich oxygen and
nutrients from your digestive system to your organs,
cells and tissues. The blood then returns to the heart via
veins carrying carbon dioxide and other waste.
 Quick Check (pg. 145)
-Critical Thinking: Why does your body need
a circulatory system?
a) It is needed to transport food, oxygen and nutrients to all
cells, tissues and organs in the body. It also carries away
waste.
Human Body Systems: Lesson 4
Page 7
The Circulatory System: Main Ideas
2) What are the parts of the heart? (pg. 146-147)
a) aorta, right atrium, left atrium, heart valves,
right ventricle and left ventricle.
 Quick Check (pg. 147)
-Critical Thinking: What do you think happens to
a person when the heart valves are not
working?
a) Blood could flow the wrong direction causing
serious health concerns.
Human Body Systems: Lesson 4
Page 8
The Circulatory System: Main Ideas
3) How do blood and blood vessels
work? (pg. 148-149)
a) Blood absorbs and transports oxygen, nutrients,
waste and carbon dioxide through out the body.
Blood vessels are the muscular tubes that blood
travel through.
 Quick Check (pg. 149)
-Critical Thinking: Why are there more red blood cells
that white blood cells?
a) red blood cells transport oxygen and nutrients,
therefore there needs to be more of them. White blood
cells are only a defense system that fights off infections
and germs.
Human Body Systems: Lesson 4
Page 9
The Circulatory System: Review
1) Summarize the main ideas
1) Click to Watch!
2) Think, Talk, and Write
Human Body Systems: Lesson 4