Bio47S11HO10

Bio47S11HO10 - Biology - 47 Lecture 10 Muscle Tissue Muscle...

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1 Biology - 47 Lecture 10 Muscle Tissue Muscle Tissue : Primary Tissue 4 Basic Properties : 1. Contractility : Cells actively : Function : 2. Excitability : Cells respond to : a. Nervous Innervation: b. Chemical Stimulation: 3. Extensibility : Ability to stretch over a range of lengths with: 4. Elasticity : Ability to regain : 3 Muscle types : 1. Skeletal Muscle; “ Striated or Voluntary Voluntary : ONLY ; Histology Appearance : a. Striated : “Stripped” b. Multiple Nuclei: Aides in extensive: c. Elongated: Long string-like cells MYOFIBER: Functions : Via Contraction a. Skeletal movement b. Organ support c. Posture / skeletal support d. Guard body entrances & exits e. Help maintain temperature
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2 2. Smooth Muscle : “ Involuntary Histology Appearance : a. b. c. Function : 1. PUSH : 2. Regulate : 2. Regulate : 3. Cardiac Muscle : “ Involuntary Histology Appearance : 1. Striped = 2. Specialized intercellular junctions : a. b. Form visible histological structure: Function : Create pressure to force: ONLY found in the Skeletal Muscle : Gross Anatomy Root words : Sarkos = “ flesh ” & Myo = “ muscle Muscle Connective Tissue : 3 Layers or “wrappings
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3 1. Epimysium : Epi = “ on or above Surrounds & contains :
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Bio47S11HO10 - Biology - 47 Lecture 10 Muscle Tissue Muscle...

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