Adipose Tissue Areolar Connective Tissue Matrix is an areolar tissue in which fat globules predominate Many cells contain large lipid deposits Functions insulates the body protects some organs serves as a site of fuel storage Blood Most widely distributed connective tissue Soft pliable tissue Contains all fiber types Can soak up excess fluid Cells surrounded by fluid matrix Fibers are visible during clotting Functions as the transport vehicle for materials Fight infections ONLY fluid connective tissue Body coverings body linings glandular tissue Where are epithelial tissues found Bone Osseous cells in lacunae cavities Composed of hard matrix of calcium salts large numbers of collagen fibers Used to protect and support the body Cardiac Muscle Found only in the heart Function is to pump blood involuntary Cells attached to other cardiac muscle cells at intercalated disks gap junctions Cells are striated striped One nucleus per cell Cardiac nervous What tissues are replaced largely with scar tissue Conductivity Respond to natural changes in the environment detect and send messages Connective Tissue Dense Connective Tissue Found everywhere in the body Includes the most abundant and widely distributed tissues Functions Binds body tissues together supports the body provides protection Main matrix element is collagen fibers Cells are fibroblasts EX tengon muscle bone ligaments bone bone Elastic Cartilage Provides elasticity EX supports the external ear Epithelial fibrous connective tissue and bone What tissues regenerate easily Epithelium Cells fit closely together Tissue layer always has one free surface Lower surface is bound by a basement membrane Avascular no blood supply Regenerate easily Epithelium Connective tissue Nervous tissue Muscle Name the four primary types of body tissues Extracellular matrix Non living material that surrounds living cells Fibrocartilage Highly compressible EX forms cushion like discs between vertebrae Fibrosis Repair by dense fibrous connective tissue scar tissue Formation of granulation tissue In tissue repair when is the beginning of actual repair Ground substance and fibers What are the two main elements in extracellular matrix Hyaline Cartilage Most common cartilage Composed of abundant collagen fibers rubbery matrix Entire fetal skeleton is hyaline cartilage Irritability Electrochemical messages from one tissue to another Mass viability With old age there is a decrease in and in most tissues Muscle Function is to produce movement Three types skeletal cardiac smooth Nervous Tissue Neurons and nerve support cells Function is to send impulses to other areas of the body Protections absorption filtration secretion Functions of epithelial tissues Pseudostratified Single later but some cells are shorter than others Often looks like a double cell layer Sometimes ciliated such as in respiratory tract May function in absorption or secretion Regeneration Replacement of destroyed tissue by the same kind of cells skin Regeneration and fibrosis Name two types of tissue repair Reticular Connective Tissue Delicate NETwork of interwoven fibers Forms stroma internal supporting network of lymphoid organs lymph nodes spleen bone marrow Scars Regeneration of surface epithelium Simple Columnar Simple Cuboidal Simple Squamous Single layer of tall cells Often includes goblet cells which produce mucus Lines digestive tract Single layer of cube like cells Common in glands and their ducts Forms walls of kidney tubules Covers the ovaries Single layer of flat cells Usually forms membranes Lines body cavities Lines lungs and capillaries Simple one layer Stratified more than one layer What are the classifications of epithelium Skeletal Muscle Can be controlled voluntarily Cells attach to connective tissue Cells are striated striped Cells have more than one nucleus Locomotion and body heat Skeletal muscle What tissue regenerates poorly Smooth Muscle Involuntary muscle Surround hollow organs Attached to other smooth muscle cells No visible striations One nucleus per cell Squamous flattened Cuboidal cube Columnar column like Shapes of epithelium Stratified Columnar Surface cells are columnar cells underneath vary in size and shape Stratified Cuboidal Two layers of cuboidal cells Stratified Cuboidal and Columnar Rare in human body Found mainly in ducts of large glands Stratified Squamous Cells at the free edge are flattened Found as a protective covering where FRICTION is common Found in skin mouth and esophagus Tissues Groups of cells with similar structure and function Transitional Epithelium Shape of cells depends upon the amount of stretching Lines organs of the urinary system Variations in blood supply and extracellular matrix Name two dominant characteristics of Connective tissues