muscle and nervous tissue - alabama school of fine arts...types of muscle and nervous tissue 1....
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Muscle and Nervous Tissue
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Types of Muscle and Nervous Tissue
1. Muscle tissue (muscle system)● Skeletal muscle (muscles attached to the skeleton)● Smooth muscle (muscles lining hollow organs)
● Cardiac muscle (heart)
4. Nervous tissue (nervous system)
○ neuron
○ glial cells
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Copyright © 2010 Pearson Education, Inc.
Figure 4.10a Muscle tissues.
(a) Skeletal muscle
Description: Long, cylindrical,multinucleate cells; obviousstriations.
Function: Voluntary movement;locomotion; manipulation of theenvironment; facial expression;voluntary control.
Location: In skeletal musclesattached to bones oroccasionally to skin.
Photomicrograph: Skeletal muscle (approx. 460x).Notice the obvious banding pattern and thefact that these large cells are multinucleate.
Nuclei
Striations
Part ofmuscle fiber (cell)
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Copyright © 2010 Pearson Education, Inc.
Figure 4.10b Muscle tissues.
(b) Cardiac muscle
Description: Branching, striated, generally uninucleate cells that interdigitate atspecialized junctions (intercalated discs).
Function: As it contracts, it propels blood into the circulation; involuntary control.Location: The walls of the heart.
Photomicrograph: Cardiac muscle (500X);notice the striations, branching of cells, andthe intercalated discs.
Intercalateddiscs
Striations
Nucleus
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Copyright © 2010 Pearson Education, Inc.
(c) Smooth muscle
Description: Spindle-shapedcells with central nuclei; nostriations; cells arranged closely to form sheets.
Function: Propels substancesor objects (foodstuffs, urine,a baby) along internal passage-ways; involuntary control.
Location: Mostly in the wallsof hollow organs.
Photomicrograph: Sheet of smooth muscle (200x).
Smoothmusclecell
Nuclei
Figure 4.10c Muscle tissues.
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Copyright © 2010 Pearson Education, Inc.
Figure 4.9 Nervous tissue.
Photomicrograph: Neurons (350x)
Function: Transmit electricalsignals from sensory receptorsand to effectors (muscles andglands) which control their activity.
Location: Brain, spinalcord, and nerves.
Description: Neurons arebranching cells; cell processesthat may be quite long extend fromthe nucleus-containing cell body;also contributing to nervous tissueare nonirritable supporting cells(not illustrated).
Dendrites
Neuron processes Cell body
Axon
Nuclei ofsupportingcells
Cell bodyof a neuron
Neuronprocesses
Nervous tissue
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What kind of tissue does this represent?
Where in the body can you find this tissue?
Skeletal muscle
muscles attached to the skeleton
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What kind of tissue does this represent?
Where in the body can you find this tissue?
Smooth muscle
muscles lining hollow organs
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What kind of tissue does this represent?
Where in the body can you find this tissue?
Cardiac muscle
heart
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What kind of tissue does this represent?
Where in the body can you find this tissue?
Motor Neuron Junction
Where motor nerves meet skeletal muscle
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What kind of tissue does this represent?
Where in the body can you find this tissue?
Nervous tissue
nervous system