External and Internal Defense

Pathogens can cause.....

• diseases

• calcium deficiency

Tags

NGSS.MS-LS2-4

Which of the following illness is caused by pathogens?

• cough, flu, fever

• road accident

What is the main purpose of the immune system?

• protect the body from pathogens

• get rid of waste from the body

Which would most likely prevent a cold virus from spreading in a classroom?

• tissue at a teacher's desk

• students wash hands regularly with soap

The human body has both internal and external defense against disease.  Which of these includes only internal defenses?  

• hair and inflammation
• white blood cells and sweat
• inflammation and white blood cells
• skin and mucus

Why might you become ill after visiting a friend who is sick with the flu?

• The virus that causes the flu entered your body.

• You ate the same kind of food your friend ate.

One of the most important functions of the skin is to

• carry food to body cells.

• protect the body.