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Connective Tissue Connects body parts Most abundant and widely distributed Protects, supports, and binds together other tissues.

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Presentation on theme: "Connective Tissue Connects body parts Most abundant and widely distributed Protects, supports, and binds together other tissues."— Presentation transcript:

1 Connective Tissue Connects body parts Most abundant and widely distributed Protects, supports, and binds together other tissues

2 Characteristics Most are vascularized- except tendons, cartilages, and ligaments Made up many different types of cells and nonliving substances (extracellular matrix)

3 Extracellular Matrix ECM- produced by connective tissue cells Made up of two elements: ground substance and fibers Ground substance- water, adhesion proteins, and polysaccharides – Is a water reservoir for the body Fibers- collagen (white) strength, elastic (yellow) stretch and coil, reticular (fine collagen fibers form internal skeleton of soft organs) Due to ECM connective tissues form soft packing tissue around organs to bear weight, withstand stretching

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5 Types of Connective Tissues A. Bone- osseous- composed of bone cells sitting on cavities called lacunae and surrounded by a hard matrix that contains calcium, salts, and large #’s of collagen Bone protects and supports organs

6 B. Cartilage Less hard and more flexible Most common- hyaline cartilage- abundant collagen fibers with rubbery matrix (glassy, blue-white appearance) Forms supporting structures such has larynx, attaches ribs to breastbone, covers the ends of many bones near joints Cartilage is replaced by bone in infants Fibrocartilage forms disks b/t vertebrae Elastic cartilage- found in ear

7 C. Dense Connective Tissue (dense fibrous tissue) Mostly made up of collagen fibers Fibroblasts- found inbetween collagen and forms the building blocks of fibers Forms strong structures such as tendons and ligaments Tendons- atttach skeletal muscle to bone Ligaments- connect bones to bones (joints) (contain more elastic fibers than tendons) Makes up lower layers of the skin (dermis)

8 D. Loose Connective Tissue- Are softer and have more cells and fewer fibers 1. Areolar tissue- soft, pliable, cobwebby tissue that cushions and protects organs – It is a packaging tissue and “glue” holds internal organs in their positions – Fibers form loose network appears to be empty space – Reservoir for water and salts – When inflamed, the areolar soaks up excess fluid and becomes “puffy” (edema) – Phagocytes wonder through this tissue to pick up dead cells, debris

9 D2- Adipose Tissue- fat Its an areolar tissue in which fat cells predominate Drop of oil occupies the cell, compressing the nucleus Forms tissue beneath the skin, insulates the body Protects some organs (kidenys) and cushions eyballs in socket Fat deposits in the body – hips, and breats where it is stored for fuel if needed

10 E- Blood (vascular tissue) Blood cells surrounded by nonliving matrix (plasma) Fibers are protein molecules only visible during clotting Blood carries wastes, nutrients, and respiratory gases


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