Chapter 5 tissues

Body tissues Group of cells that are similar in structure and function.

Four types of tissues Epithelium-covering Connective-support Nervous-control Muscle-movement *tissues from organs may contain several types

Epithelial Nervous Connective Muscular

Epithelial: Lining, covering and glandular tissue Protection (skin) Absorption (lining of the digestive system) Filtration (kidneys) Secretion (glands) Are avascular-no blood supply

Classification of epithelia tissue-classified by shape and arrangement: Squamous-flat scale Cuboidal-cubed Columnar-tall & elongated Simple-one layer Stratified-many layers

Connective: Protection, support and binding Most abundant tissue type found every where in the body Vascular-high in blood supply-with the exceptions of tendons and ligaments

Types of connective tissue Bone Cartilage Dense connective-tendons and ligaments Loose connective-adipose blood

Definitions: Tendon-connects muscle to bone Ligament-bone to bone Cartilage-covers the ends of bone-hard rubbery material

Nervous: Neuron cells-conduct electrochemical impulses Can be up to 3 feet long

Muscle: Contracts and shortens

Types of muscle tissue Skeletal-voluntary-striations (stripes) Cardiac-heart only-involuntary-striations Smooth-involuntary-no striations-walls of hollow organs such as stomach, bladder and uterus-contract slowly

Review: There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body). Muscle tissue includes striated (also called voluntary) muscles that move the skeleton, and smooth muscle, such as the muscles that surround the stomach. Nerve tissue is made up of nerve cells (neurons) and is used to carry "messages" to and from various parts of the body.

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