Examlex
One drawback of an identification key is that it may oversimplify the differences between two organisms because it cannot list all the characteristics of each group.
Acquired Immune Deficiency Syndrome
A life-threatening condition caused by the human immunodeficiency virus (HIV) that severely damages the immune system.
Human Immunodeficiency Virus
A virus that attacks the immune system, the body's natural defense against illness, and can lead to AIDS if not treated.
Immune System
The body's defense mechanism against infections and diseases, comprising organs, tissues, cells, and proteins that work together to protect the body.
Human Immunodeficiency Virus (HIV)
A virus that attacks the human immune system, depleting the body’s ability to fight infection; the infection that causes AIDS.
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