Connective tissue 1 Loose Connective Tissue Areolar Adipose

Connective tissue 1. ) Loose Connective Tissue -Areolar -Adipose -Reticular 2. ) Dense Connective Tissue -Dense Regular -Dense Irregular -Elastic 3. ) Cartilage -Hyaline -Elastic -Fibrocartilage 4. ) Bone -osseous tissue 5. ) Blood

Areolar Tissue • Type of loose connective tissue • Wraps and cushions organs • Is found just under epithelial tissue • Packages capillaries and blood vessels • You receive shots in this tissue

Adipose Tissue • Observed as a large bubble-like cell lumped together. • Cells are filled with fat (adipocytes) • Stored energy for the body. • Helps cushion areas like the eyes, kidneys, abdomen, and breasts. • Also insulates the body and organs

Adipose Tissue Figure 4– 10 a

Types of Adipose Tissue • White fat: o most common o stores fat o absorbs shocks o slows heat loss (insulation) • Brown fat: very little in adults -more vascularized -adipocytes have many mitochondria -breaks down fat -produces heat

Reticular Tissue • Large dark fibers that help support the cells of certain organs- spleen, liver, lymph nodes and bone marrow. • Fibers help support other cells within the tissue like o White blood cells o Mast cells o macrophages

Reticular Tissue Figure 4– 10 b

Dense Regular Tissue • This is the tissue of tendons and ligaments. Holding bones to bones or muscles to bones. • Withstands tension as force is applied in one direction. • Mainly called collagen fibers. (Parallel fibers) • Embedded in the fibers are fiber producing cells called Fibroblasts.

Dense Irregular Tissue • Tissue within the Dermis of skin, Submucosa of the digestive tract and Fibrous Capsules of organs and joints. • Able to withstand force exerted in many different directions, while providing structural support. • Instead of being organized neatly as parallel fibers, fibers seem more unorganized within the tissue.

Cartilage Types • Hyaline Cartilageo Chondrocyte Cells form an amorphous matrix (no form) that is compact with fibers of collagen. o The cells sit in tiny chambers called Lacunae. o Has very resilient cushioning properties that support and reinforce during compressive force. o Found on the ends of long bones within a joint, form the costal cartilage of the ribs, as well as the cartilage of the nose, trachea and larynx.

Elastic cartilage • Similar to hyaline cartilage but with more elastic fibers within. • Maintains shape and structure while allowing great flexibility. • Found on the outer ear (pinna) and epiglottis.

Fibrocartilage • Less firm than that of hyaline cartilage. • Thick collagen fibers predominate in the tissue. • Great ability to withstand shock • Found within intervertebral discs, pubic symphysis, and discs within the knee