Q.What are complement proteins?

The mononuclear phagocyte system consists of a family of related phagocytic cells, all derived from bone-marrow monocyte precursors, found in blood and various tissues.

The mononuclear phagocyte system (formerly called the reticuloendothelial system) is made up of cells that share a common origin from bone marrow stem cells, circulate briefly as monocytes, and then settle in different tissues where they mature into tissue-specific macrophages, all capable of phagocytosing pathogens, debris, and dead cells.

Four examples of mononuclear phagocytes:

1. Monocytes - large, mononuclear white blood cells that circulate in the blood and can migrate into tissues.
2. Macrophages - monocytes that have migrated into connective tissue and differentiated into large phagocytic cells (e.g., histiocytes). …

Mononuclear phagocytes are single-nucleus white blood cells specialised for phagocytosis; examples include monocytes, macrophages, dendritic cells and organ-specific macrophages.

Mononuclear phagocytes form part of the innate (non-specific) immune system. They engulf and destroy pathogens, dead cells and debris by phagocytosis, and several also act as antigen-presenting cells that activate the adaptive immune response.

Four examples:

1. Monocytes - circulate in the blood and differentiate into macrophages when they migrate into tissues.
2. Macrophages - large phagocytic cells resident in connective tissue and organs. …

Four mononuclear phagocytes are monocytes, macrophages, Kupffer cells (liver) and microglia (CNS).

The mononuclear phagocyte system (also called the reticulo-endothelial system) is a group of phagocytic cells that have a single (mononuclear) nucleus and engulf pathogens, dead cells and debris as part of the body's defence.

Four important mononuclear phagocytes are:

1. Monocytes: the largest white blood cells, circulating in the blood; they migrate into tissues and become macrophages.
2. Macrophages: large phagocytic cells present in connective tissue and organs, derived from monocytes; they engulf microbes and present antigens. …

The mononuclear phagocyte system consists of single-nucleus phagocytic cells derived from bone-marrow monocyte precursors.

The Mononuclear Phagocyte System (MPS) consists of cells with a single (non-lobed) nucleus that are specialised for phagocytosis (engulfing pathogens/debris) and antigen presentation, all derived from bone-marrow monocyte precursors.

Four examples:

1. Monocytes - circulate in the blood; the largest white blood cells.
2. Macrophages - monocytes that have migrated into tissues and matured; engulf pathogens and present antigens.
3. Dendritic cells - found in the skin and mucosa; capture antigens and present them to T-cells. …