Tissues Similar Cells serving the same purpose Tissue

Tissue Types and Varieties u Epithelial Tissue u Connective u Muscle Tissue u Nervous

Epithelial Tissue / Epithelium u Covers the body – lines the cavities u Closely

Classification of Epithelial Tissue By Shape u Squamous – flat and scale-like. u Cuboidal

Connective Tissue u Most abundant in the body, widely distributed. u Has the most

Varieties of Connective Tissue Areolar – glue that holds organs together. Pg. Adipose –

Varieties Continued: Cartilage – Made of chondrocytes. Firm and plastic-like. Blood – Liquid is

Muscle Tissue Skeletal - attaches to bones, also called striated or voluntary, striations visible

Nervous Tissue u Neurons - conduct impulses, rapid communication from brain to organs. Components=Axon,

Tissue Repair and Regeneration u Epithelial and connective regenerate easily. Ex: skin, bone, tendons

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Tissues Similar Cells serving the same purpose

Tissue Types and Varieties u Epithelial Tissue u Connective u Muscle Tissue u Nervous Tissue

Epithelial Tissue / Epithelium u Covers the body – lines the cavities u Closely packed cells – no matrix u Contains u Always no blood vessels anchored to a basement membrane.

Classification of Epithelial Tissue By Shape u Squamous – flat and scale-like. u Cuboidal – square or cube-like. u Columnar – columns that are higher than they are wide. By Arrangement u Simple – single layer, same shape. u Stratified – many layers, same shape. u Transitional – several layers changes from one shape to another. u Pseudostratified – appears stratified, but all cells attached to basement membrane.

Connective Tissue u Most abundant in the body, widely distributed. u Has the most forms and varieties u Does contain intracellular matrix. u Cells called fibroblasts produce reinforcing fibers.

Varieties of Connective Tissue Areolar – glue that holds organs together. Pg. Adipose – (fat) lipid or energy storage. Fibrous – firm yet flexible, ex: tendon. Bone – calcified matrix, functions in support, protection, mineral storage. Haversian systems are bone building areas.

Varieties Continued: Cartilage – Made of chondrocytes. Firm and plastic-like. Blood – Liquid is the matrix, cells are red, white, and platelets. Function is transportation of cellular materials.

Muscle Tissue Skeletal - attaches to bones, also called striated or voluntary, striations visible under microscope. u Cardiac - composes walls of heart, also called striated and involuntary, striations visible, intercalated disks present. u Smooth - non-striated and involuntary, lines the blood vessels and tube-shaped organs. u

Nervous Tissue u Neurons - conduct impulses, rapid communication from brain to organs. Components=Axon, Dendrite, Cell Body. u Glia - supportive and connective.

Tissue Repair and Regeneration u Epithelial and connective regenerate easily. Ex: skin, bone, tendons and ligaments. Muscle and nervous have limited abilities to repair. Ex: paraplegic, quadriplegic, nerve damage. u