advertisement
23 April 2007

T cells

T cells have two major roles in immune defense. Regulatory T cells are essential for orchestrating the response of an elaborate system of different types of immune cells.

0
T cells have two major roles in immune defense. Regulatory T cells are essential for orchestrating the response of an elaborate system of different types of immune cells.

Helper T cells, for example, also known as CD4 positive T cells (CD4+ T cells), alert B cells to start making antibodies; they also can activate other T cells and immune system scavenger cells called macrophages and influence which type of antibody is produced.

Certain T cells, called CD8 positive T cells (CD8+ T cells), can become killer cells that attack and destroy infected cells. The killer T cells are also called cytotoxic T cells or CTLs (cytotoxic lymphocytes).

(Source: National Institutes of Health)

 
NEXT ON HEALTH24X
advertisement

Read Health24’s Comments Policy

Comment on this story
0 comments
Comments have been closed for this article.

Live healthier

Hello? »

SEE: Interesting facts about hearing loss Earworms: Let it go Is it bad to sleep with earplugs all the time?

SEE: Do women hear better than men?

The reason why men often appear not to be listening could be because they actually can't hear you.

Confident smile? »

Acidic drinks can harm your kids' smiles The facts on bleaching your teeth Am I taking good care of my teeth?

Why are my teeth stained?

We know the rules – brush your teeth twice a day and floss to keep them healthy. But, have you ever wondered what causes those stains that sometimes appear?