Unit 3: histology

Part 4: connective Tissue proper

Functions of Connective Tissue•Connective tissues provide support& bind other tissues together•They can provide insulation & protection for other tissues•Some are able to transportsubstances

What Characteristics do all Connective Tissues Share?

•All connective tissues are formed from onetype of stem cell (mesenchyme)•Connective tissues vary in their degree of vascularity (presence of blood vessels)•All connective tissues are mostly composed of extracellular matrix

Loose Connective

Tissue

• Areolar• Adipose• Reticular

Dense Connective

Tissue

• Regular• Irregular• Elastic

Types of Loose Connective Tissue

•Mostly open space•Holds water & salts for surrounding tissues•Found under epithelium & around organs

Types of Loose Connective Tissue

•Comprised of fat cells (adipocytes)•Have large vacuoles that contain fat/oil• Insulates & warms the body•Provides nutrients to other cells

Types of Loose Connective Tissue

•Contains reticular fibers, which create a stiff framework that support other cells

Types of Dense Connective Tissue

•Collagen fibers are arranged in one direction•Provides “tensile strength” like a rope•Found in tendons & ligaments

Types of Dense Connective Tissue

•Collagen fibers are arranged in many directions•Provides strength in multiple directions•Found in capsules around organs

Types of Dense Connective Tissue

•Provides flexible cushioning•Found between vertebrae & in arteries

SummaryConnective tissue is used to supportand bind other tissues. It is made of cells surrounded by an extracellularmatrix. The matrix is made of fibersthat are loosely or densely arranged.