Macrophage
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Monocyte in blood
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Macrophages in tissue
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Nuclear indentation
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Cytoplasm
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Lysosomes
Macrophages are the major phagocytic cell in connective tissue. They are derived from blood-borne monocytes (upper left) that migrate into the tissue (two lower left panels). The ultrastructure of a macrophage is shown on the right. Macrophage nuclei are oval-shaped and frequently indented, reflecting the cell’s origin from a monocyte. The pink cytoplasm, when visible, contains numerous lysosomes and phagocytosed material. 1000x (LM), 8000x (EM)
Membrane ruffles >
Macrophages are highly motile, phagocytic cells and possess a heavily folded and ruffled plasma membrane.