LECTURE 8: Muscle and Nervous Tissue

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LECTURE 8Muscle and Nervous Tissue
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What are muscle cells?

• Sometimes called muscle fibers because of
  elongated shape
• Contractile
• 3 types
• skeletal
• smooth
• cardiac

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What are the characteristics of Skeletal Muscle
Tissue?

• Forms muscle that attaches to bone
• multinucleate
• Voluntary muscle
• Contain Striations
• Light and dark cross-markings
• Nerve cell sends impulses which causes contraction

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What are the functions of Skeletal Muscle Tissue?

• Body Movement
• Head
• Trunk
• Limbs
• Facial expressions
• Write/talk/chew/breath/swallow

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What are the characteristics of Smooth Muscle
Tissue?

• Lacks striations
• Shorter than skeletal
• Spindle shaped
• Involuntary
• Single nucleus
• Walls of hollow internal organs

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What are the functions of Smooth Muscle Tissue?

• Move food through digestive tract
• Constrict blood vessels
• Empty urinary bladder

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What are the characteristics of Cardiac Muscle
Tissue?

• ONLY in heart
• Striated and branched cells
• Complex networks
• Single nucleus
• Involuntary
• Can contract without nerve impulse
• Intracalated Disc
• Junction between cardiac muscle cells

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What are the functions of Cardiac Muscle Tissue?

• Makes up the bulk of the heart
• Pumps blood through heart chambers into blood
  vessels
• Can continue to function without nerve impulses

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What are the characteristics and functions of
Nervous Tissue?

• Found in brain, spinal cord, and peripheral
  nerves
• Basic cells called neurons (nerve cells)
• Very complex network can regulate body functions
• Neuroglial Cells
• Very abundant
• Support/bind components of nervous tissue
• Carry on phagocytosis
• Brings nutrients to neurons connecting them to
  blood vessels