Adipose Tissue (Loose Connective Tissue)

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Presentation transcript:

Adipose Tissue (Loose Connective Tissue) Warm-Up What type of connective tissue is shown below? 1. 2. Adipose Tissue (Loose Connective Tissue) Cartilage 3. 4. Bone Blood

Tissue: The Living Fabric Chapter 4 Tissue: The Living Fabric

Part II: Connective Tissue

Connective Tissue Most abundant and widely distributed tissue Main classes: Connective tissue proper (loose & dense) Cartilage Bone Blood Functions: Binding and support Protection Insulation Transport substances

Classification Variations in blood supply Extracellular matrix Avascular (no blood) – cartilage Poorly vascular – tendons, ligaments Extracellular matrix Produced by cells, secreted to exterior Ground substance: “glue” - fills space between cells & fibers water + adhesion proteins + polysaccharides Fibers: provide support Collagen - strength Elastic – stretch Reticular – fine network, “skeleton” of organs

Loose Connective Tissue Universal packing material Subclasses: areolar, adipose, reticular Structure: softer, fewer fibers, gel-like matrix Functions: Cushion & protect organs (areolar, fat) Store nutrients (fat) Internal framework (reticular) Fight infection (areolar) Cells: fibroblasts, adipocytes (fat cells) Locations: under skin, lymph nodes, hips, behind eyeballs

Dense Connective Tissue Tendons & ligaments Subclasses: dense regular, dense irregular, elastic Structure: mainly collagen fibers Functions: Elastic Resist tension Cells: fibroblasts Locations: tendons (muscle-bone), ligaments (bone-bone), lower layers of skin

Cartilage Subclasses: hyaline, elastic, fibrocartilage Structure: flexible, no nerves or blood Functions: Support Compression Cells: chondroblasts, chondrocytes Locations: larynx, joints, tip of nose, ear, intervertebral discs, rib-breastbone, knee joint

Bone Osseous tissue Subclasses: compact, spongy Structure: hard, calcified matrix; blood vessels Functions: support & protect Store calcium Blood cell formation (marrow) Cells: osteoblasts, osteocytes Locations: bones

Blood Vascular tissue Subclasses: blood cells, plasma Structure: fluid within blood vessels, no fibers Functions: Transport vehicle (nutrients, wastes, gases, hormones) Cells: white blood cells (leukocytes), red blood cells (erythrocytes), platelets Locations: blood vessels