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Connective Tissue Types and Features in Anatomy & Physiology

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  • What characterizes reticular connective tissue?

    Contains only reticular fibers (thin collagen), with reticular cells. Located in lymphoid organs like lymph nodes, bone marrow, and spleen. It forms a soft internal skeleton supporting free blood cells.

  • What is the main fiber type in dense regular connective tissue?

    Thick collagen fibers running parallel to the direction of pull, providing very high tensile strength and flexibility.

  • Where is dense regular connective tissue found and what is its function?

    Found in tendons, ligaments, and aponeuroses. It functions to attach structures with great strength and resist tension and stretching.

  • How does dense irregular connective tissue differ from dense regular connective tissue?

    Dense irregular CT has thicker collagen bundles arranged irregularly, allowing it to withstand tension from many directions.

  • Where is dense irregular connective tissue located?

    Located in the dermis, submucosa of the digestive tract, and fibrous capsules of organs and joints.

  • What is elastic connective tissue and where is it found?

    Similar to dense regular CT but with a very high content of elastic fibers. Found in elastic ligaments (e.g., connecting vertebrae) and walls of large arteries.

  • What are the key features of cartilage?

    Tough but flexible tissue, avascular and without nerve fibers. Matrix secreted by chondroblasts and chondrocytes, with 80% water, collagen fibers, and sugar proteins like chondroitin and hyaluronic acid.

  • What are the three types of cartilage?

    Hyaline cartilage, elastic cartilage, and fibrocartilage.

  • What gives bone its hardness and strength?

    Inorganic calcium salts provide hardness and strength for support and protection of softer tissues.

  • What cells are involved in bone formation and maintenance?

    Osteoblasts build bone, osteocytes maintain bone, and osteoclasts break down bone.

  • How is bone different from cartilage in terms of vascularization and collagen content?

    Bone is richly vascularized and contains more collagen than cartilage.

  • Why is blood considered an atypical connective tissue?

    Because it consists of cells suspended in a nonliving fluid matrix (blood plasma), with soluble protein fibers visible only during clotting.

  • What are the main functions of blood as connective tissue?

    Transporting nutrients, wastes, gases, and other substances throughout the body.

  • Which fibrous element gives connective tissue high tensile strength?

    Collagen fibers provide high tensile strength.

  • Which cell forms bone tissue?

    Osteoblasts are the cells that form bone.

  • Which connective tissue acts like a sponge soaking up fluid during edema?

    Areolar connective tissue soaks up fluid when edema occurs.