What is Areolar. loose connective tissue, contains yellow elastic, white fibres, fibroblasts and mast cells, found all over body. What is Adipose. fatty tissue in matrix of areolar, white and brown, between muscle fibres, protects, insulates, retains heat, food store, contour, found kidneys, back eyes, etc.
Dendritic cells are present in those tissues that are in contact with the external environment, such as the skin (where there is a specialized dendritic cell type called the Langerhans cell) and the inner lining of the nose, lungs, stomach and intestines.
Langerhans cell. Langerhans cells are dendritic cells (antigen-presenting immune cells) of the skin and mucosa, and contain organelles called Birbeck granules. They are present in all layers of the epidermis and are most prominent in the stratum spinosum.
Microglia are a type of neuroglia (glial cell) located throughout the brain and spinal cord. Microglia account for 10–15% of all cells found within the brain. As the resident macrophage cells, they act as the first and main form of active immune defense in the central nervous system (CNS).
An osteoclast (from Ancient Greek ὀστέον (osteon), meaning 'bone', and κλαστός (clastos), meaning 'broken') is a type of bone cell that breaks down bone tissue. This function is critical in the maintenance, repair, and remodelling of bones of the vertebral skeleton.