TISSUES OF THE HUMAN BODY

Tissues are groups of cells with a common structure and function. Tissues are classified into four main categories: Tissues are classified into four main categories: epithelial tissue, connective tissue, nervous tissue, and muscle tissue.

Outside of body and lines organs and cavities; held together by tight junctions Epithelial Tissue

Epithelial Descriptions: Squamous=flat Cuboidal=cube shape Columnar=column shape Simple= 1 layer Stratified= many layers Pseudostratified= looks like a few layers, but actually only one.

What is it?

The major types of connective tissues in vertebrates are dense (regular) tissue, loose connective tissue, adipose tissue, fibrous(irregular) connective tissue, cartilage, bone, and blood. Each has a structure correlated with its specialized function. Connective Tissue

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Muscle cells or fibers capable of contracting when stimulated by nerve impulses Long multi-nucleated cells 3 types of Muscular tissue: Skeletal: voluntary movement (striated) Cardiac: contractile wall of heart (branched striated) Smooth: involuntary activities (no striations) Muscle Tissue

Senses stimuli and transmits signals from 1 part of the animal to another Senses stimuli and transmits signals from 1 part of the animal to another Nervous tissues are found in the brain, spinal cord, and nerves. Nervous tissues are found in the brain, spinal cord, and nerves. 2 types of cells: Neurons, or nerve cells, conduct nervous impulses Neurons, or nerve cells, conduct nervous impulses Neuroglia, Helper cells, support and nourish the neurons. Neuroglia, Helper cells, support and nourish the neurons. Nervous Tissue

What do You Remember? For each of the following slides, wait for Mr. Smuts to ask you what the tissue is before you answer.

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