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Essential Question:
How do major organ systems
work together in living organisms?
Standards:
S7L2d. Explain that tissues, organs, and organ systems
serve the needs cells have for oxygen, food, and waste
removal.
S7L2e. Explain the purpose of the major organ systems in
the human body (i.e., digestion, respiration, reproduction,
circulation, excretion, movement, control and
coordination, and for protection from disease).
Why did Rick and the other
survivors fight for the prison? What
purpose did it serve for them?
Protection
from
Disease
• Your body has many ways to defend itself
• One of the body’s best defenses is to keep foreign
materials from entering the body in the first place.
• The skin is a physical barrier that keeps pathogens
(agents that cause disease) and other foreign
materials out of the body.
Integumentary
System
• The Integumentary System includes skin, hair,
and nails
• The skin guards against infection
• The skin helps maintain balance
(homeostasis). For example, when you are too
hot you sweat to cool off.
• The skin also senses the environment.
Protection from Disease
• The Integumentary (Skin), Respiratory, and
Digestive Systems are the first lines of
defense against pathogens (agents that
cause disease)
• Sneezing and coughing are ways to defend
the body. Also, hair-like fibers found in the
nose and lungs help trap particles.
• Saliva, mucus, stomach acids and other
substances help destroy foreign materials
When the first lines of defense do not
keep pathogens (agents that cause
disease) out, the Immune System
steps in.
Immune System
Role of the
Immune System
Recognize, attack, and
destroy foreign cells or
substances that may cause
disease
Organs of the Immune System
White Blood Cell
T Cell
Antibodies
B Cell
Immune System Video
http://www.youtube.com
/watch?v=WJEc2GDEfz8
OR
https://www.youtube.com/watch?
v=RFk02G6Q9GU
Magic School Bus Immune System 16 mins
The Lymphatic System
The lymphatic
system transports
pathogen-fighting
white blood cells
throughout the
body.
The Lymphatic System
Lymph is a fluid left
in the tissues by the
circulatory system
and it moves
through lymph
vessels (like veins).
The Lymphatic System
Lymph travels
through lymph
nodes which filter
out pathogens and
store white blood
cells.
Viral Attack Comic
3–2–1
Identify 3 systems of the body that
work to protect the body from
disease.
Identify 2 organs that are used to
protect the body from disease.
Identify 1 way in which the body
naturally works to protect the
body.