Cells of the
Cells of the Immune System
Immune System
Learning Objectives
Cells of the immune system: Leukocytes
Granulocytes
• Basophil
• Eosinophil
• Neutrophil
Mast Cells
Agranulocytes
• Monocytes: Macrophage
• Lymphocytes: NK cells, B lymphocytes, T
lymphocytes
Dendritic Cells
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, Cells of the Immune System
Leucocytes
__________________________________________________________________________________
The cells of immune system arise from These leucocytes circulate in
the bone marrow. In the bone marrow bloodstream, reside within peripheral
most of these cells develop as well as tissues or circulate in lymphatic
mature. These cells are known as vessels of lymphatic system. Thus,
White Blood Cells (WBCs) or leucocytes are dispersed throughout
leucocytes (in Greek, “leukos”: white; the body.
“kytos”: cell). They are also known as
immune cells.
Figure 2.1- WBCs or Leucocytes in blood
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means, electronic or mechanical, including photocopying, recording, or by any information storage
and retrieval system, without prior written permission from the publisher.
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, Cells of the Immune System
Types of leucocytes
__________________________________________________________________________________
Leucocytes have been classified into Both groups have granules in their
two groups on the basis of their cytoplasmic matrix, but they are
appearance in stained blood smear visible under light microscope in case
under light microscope of Granulocytes and invisible in case
of Agranulocytes (the cytoplasm
1. Granulocytes
appears uniform). These granules
2. Agranulocytes
contain substances which help in
destruction of microbes and pathogens
directly or indirectly.
Granulocyte
Agranulocyte
Figure 2.2 - Granulocyte and Agranulocyte under light microscope
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying, recording, or by any information storage
and retrieval system, without prior written permission from the publisher.
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Cells of the Immune System
Immune System
Learning Objectives
Cells of the immune system: Leukocytes
Granulocytes
• Basophil
• Eosinophil
• Neutrophil
Mast Cells
Agranulocytes
• Monocytes: Macrophage
• Lymphocytes: NK cells, B lymphocytes, T
lymphocytes
Dendritic Cells
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying, recording, or by any information storage
and retrieval system, without prior written permission from the publisher.
Contact Us –
, Cells of the Immune System
Leucocytes
__________________________________________________________________________________
The cells of immune system arise from These leucocytes circulate in
the bone marrow. In the bone marrow bloodstream, reside within peripheral
most of these cells develop as well as tissues or circulate in lymphatic
mature. These cells are known as vessels of lymphatic system. Thus,
White Blood Cells (WBCs) or leucocytes are dispersed throughout
leucocytes (in Greek, “leukos”: white; the body.
“kytos”: cell). They are also known as
immune cells.
Figure 2.1- WBCs or Leucocytes in blood
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying, recording, or by any information storage
and retrieval system, without prior written permission from the publisher.
Contact Us –
, Cells of the Immune System
Types of leucocytes
__________________________________________________________________________________
Leucocytes have been classified into Both groups have granules in their
two groups on the basis of their cytoplasmic matrix, but they are
appearance in stained blood smear visible under light microscope in case
under light microscope of Granulocytes and invisible in case
of Agranulocytes (the cytoplasm
1. Granulocytes
appears uniform). These granules
2. Agranulocytes
contain substances which help in
destruction of microbes and pathogens
directly or indirectly.
Granulocyte
Agranulocyte
Figure 2.2 - Granulocyte and Agranulocyte under light microscope
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying, recording, or by any information storage
and retrieval system, without prior written permission from the publisher.
Contact Us –
