The connective tissues The connective tissues Connective tissue

The connective tissues

The connective tissues Connective tissue is the most diverse of the four tissue types with a wide variety of Functions of connective tissue: Protection of organs *Providing structural framework for the body *Connection of body tissues *connects epithelial tissues to the muscle tissues *

The matrix consist of : Protein fibers White( Collagen) fibers Yellow ( Elastic ) fibers (occur in bundles) (occur as a single and branched). * The matrix may be solid (as in bone), soft (as in loose connective tissue), or liquid (as in blood).

The fibres of areolar connective tissue : • Collagen (white) fibres : Occur in bundles and unbranched • Elastic (yellow) fibres : Single and branched

Yellow fibers matrix white fiber Areolar Connective Tissue 5

I. Cartilage is studied as an example of skeletal connective tissue. *It has 4 main functions, these are: • It forms the majority of the temporary skeleton in the mammalian embryos until it is replaced by bone. • In adults, it supports the structure of the nasal septum, ear pinna, larynx, trachea and bronchi. • It covers the articular surfaces of movable joints. • It forms the epiphyseal plate.

The hyaline cartilage: Trachea of the rabbit is studied as an example. • It is called hyaline (hyalos = gloss) because of its glossy, whitish blue appearance in the fresh state. • The matrix is semi-solid and contains very delicate collagen fibers. The refractive index of the matrix is equivalent to that of its fibers, so it appears clear. • It is the most common form of cartilage.

1 -Matrix 2 - Lacuna 3 - Chondrocytes ( Hyaline Cartilage )

The vascular Tissues v. Vascular tissues include blood and lymph tissue only. v. The matrix is liquid. The blood of man : 1/ Mature red blood cells (erythrocytes ) round and lacking nuclei 2/ White blood cells ( leucocytes) larger and round nuclei

White blood cells 2 - Agranulocytes or nongranulocytes: 1 - Granulocytes : Are the cells which characteristics with : 1/ granules on the cytoplasm 2/ have multilobed nuclei. Are the cells which characteristics with : 1/ no granules on the cytoplasm 2/ have rounded nuclei. Neutrophil Lymphocyte Eosinophil Basophil Monocyte

1 2 3 ﺏ Connective tissue (vascular tissue - blood withdrawn -) 1 -(b- cosinophils or a cidophils –a-neutrophilis)1 -The granulocytes: 2 -Lymphocytes 3 -red blood cells

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