Nervous & Muscle Tissue

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Nervous Tissue1. Main component of the

nervous system2. Brain, spinal cord, and nerves

cc: illuminaut - https://www.flickr.com/photos/21611336@N00

Neurons1. highly specialized2. generate and conduct nerve

impulses

cc: juliendn - https://www.flickr.com/photos/11689412@N02

Muscle Tissue• Well vascularized• 3 types• Skeletal, cardiac, smooth

cc: EUSKALANATO - https://www.flickr.com/photos/17657816@N05

Skeletal1. As they contract, they pull on

bones or skin, causing body movements

2. Skeletal muscle cells are also called muscle fibers

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Skeletal• Striated, long, & cylindrical

appearance

cc: Rob Swatski - https://www.flickr.com/photos/50946274@N02

Cardiac Muscle1. Found only in heart2. Also striated, but different

from skeletal

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Cardiac1. Uninucleate2. Branching cells that fit together

tightly and unique junctions called intercalated discs

cc: Chocolate Geek - https://www.flickr.com/photos/75632859@N00

Smooth1. No visible striations2. spindle shaped3. One centrally located nucleus

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Smooth1. walls of hollow organs other

than the heart,2. alternately contracts and relaxes3. involuntary control

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