Parent's Signature: _____________________
Level 1
Level 1
Name:
Date:
Subject: How the Body Fights Disease
HOMEWORK#2
Directions: Answer using complete sentences! Use the information you have been given to answer questions
about: How the Body Fights Disease
about: How the Body Fights Disease
Your body has many different ways to fight diseases. It tries to keep the pathogens from getting too far into
your body. Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin.
Layers of dead skin cells stop pathogens from entering the body. Oil contained in the skin also helps to kill
pathogens. The mouth has enzymes that kill pathogens. The stomach has acids that kill pathogens.
The nose has mucus and hairs that help to trap pathogens so they cannot get further into the body.
your body. Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin.
Layers of dead skin cells stop pathogens from entering the body. Oil contained in the skin also helps to kill
pathogens. The mouth has enzymes that kill pathogens. The stomach has acids that kill pathogens.
The nose has mucus and hairs that help to trap pathogens so they cannot get further into the body.
1. How does the mouth kill pathogens?
2. How does the stomach kill pathogens?
3. How does the nose trap pathogens so they do not go further into the body?
Parent's Signature: __________________________
Level 2
Name:
Date:
Subject: How the Body Fights Disease
HOMEWORK#2
Directions: Answer using complete sentences! Use the information you have been given to answer questions
about: How the Body Fights Disease
about: How the Body Fights Disease
Your body has many different ways to fight diseases. It tries to keep the pathogens from getting too far into your body.
Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin. Layers of dead skin
cells stop pathogens from entering the body. Oil contained in the skin also helps to kill pathogens. The mouth has enzymes
that kill pathogens. The stomach has acids that kill pathogens. The nose has mucus and hairs that help to trap pathogens so
they cannot get further into the body. The respiratory system’s airways and lungs are lined with cilia. Cilia are hair-like
structures that are covered with mucus. They move back and forth in a sweeping motion. The mucus on the cilia catches
dirt, dust, and germs. The cilia then push mucus up toward your throat. Then, you swallow the mucus or you spit it out.
In this way the cilia and mucus work together to help keep dirt, dust, and germs out of your lungs. Sneezing is also a way
of getting rid of dirt, dust, and pathogens.
Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin. Layers of dead skin
cells stop pathogens from entering the body. Oil contained in the skin also helps to kill pathogens. The mouth has enzymes
that kill pathogens. The stomach has acids that kill pathogens. The nose has mucus and hairs that help to trap pathogens so
they cannot get further into the body. The respiratory system’s airways and lungs are lined with cilia. Cilia are hair-like
structures that are covered with mucus. They move back and forth in a sweeping motion. The mucus on the cilia catches
dirt, dust, and germs. The cilia then push mucus up toward your throat. Then, you swallow the mucus or you spit it out.
In this way the cilia and mucus work together to help keep dirt, dust, and germs out of your lungs. Sneezing is also a way
of getting rid of dirt, dust, and pathogens.
1. What are the respiratory system’s airways and lungs lined with?
2. What are cilia and how do they move?
3. What does the cilia, working along with the mucus, do to keep dirt, dust and germs out of your lungs?
Parent's Signature: ______________________
Level 3
Name:
Date:
Subject: How the Body Fights Disease
HOMEWORK#2
Directions: Answer using complete sentences! Use the information you have been given to answer
questions about: How the Body Fights Disease
questions about: How the Body Fights Disease
Your body has many different ways to fight diseases. It tries to keep the pathogens from getting too far into
your body. Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin.
Layers of dead skin cells stop pathogens from entering the body. Oil contained in the skin also helps to kill
pathogens. The mouth has enzymes that kill pathogens. The stomach has acids that kill pathogens. The nose has
mucus and hairs that help to trap pathogens so they cannot get further into the body. The respiratory system’s
airways and lungs are lined with cilia. Cilia are hair-like structures that are covered with mucus. They move back
and forth in a sweeping motion. The mucus on the cilia catches dirt, dust, and germs. The cilia then push mucus
up toward your throat. Then, you swallow the mucus or you spit it out. In this way the cilia and mucus work
together to help keep dirt, dust, and germs out of your lungs. Sneezing is also a way of getting rid of dirt, dust,
and pathogens. White blood cells attack disease pathogens when they enter the body. When your skin is broken,
such as when you get a cut, pathogens can enter the body through the cut. White blood cells travel through blood
vessels to the area of the cut. Then, they destroy harmful pathogens. Sometimes, a cut will ooze white or yellow
liquid. This is called pus. Pus is actually a pool of dead white blood cells and other tissues. If pus is present,
it means the cut is infected.
your body. Different body parts have features that block or kill pathogens. One of the body’s defenses is the skin.
Layers of dead skin cells stop pathogens from entering the body. Oil contained in the skin also helps to kill
pathogens. The mouth has enzymes that kill pathogens. The stomach has acids that kill pathogens. The nose has
mucus and hairs that help to trap pathogens so they cannot get further into the body. The respiratory system’s
airways and lungs are lined with cilia. Cilia are hair-like structures that are covered with mucus. They move back
and forth in a sweeping motion. The mucus on the cilia catches dirt, dust, and germs. The cilia then push mucus
up toward your throat. Then, you swallow the mucus or you spit it out. In this way the cilia and mucus work
together to help keep dirt, dust, and germs out of your lungs. Sneezing is also a way of getting rid of dirt, dust,
and pathogens. White blood cells attack disease pathogens when they enter the body. When your skin is broken,
such as when you get a cut, pathogens can enter the body through the cut. White blood cells travel through blood
vessels to the area of the cut. Then, they destroy harmful pathogens. Sometimes, a cut will ooze white or yellow
liquid. This is called pus. Pus is actually a pool of dead white blood cells and other tissues. If pus is present,
it means the cut is infected.
1. Explain what the respiratory system is lined with, what it is, and what it is covered in.
2. Explain completely the action of the cilia as it works with the mucus, and how they work together to
remove dirt, dust, and germs from your body.
remove dirt, dust, and germs from your body.
3. Explain what pus is and what it means if pus is present.
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