Muscle Microanatomy PDF
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This document provides a detailed overview of muscle microanatomy, covering muscle characteristics, function, and the organization of different muscle tissues (smooth, skeletal, and cardiac). It also includes an explanation of the different structures of skeletal muscle.
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19 | Muscle Microanatomy Agenda Muscle characteristics and function How are different muscle tissues organized? ○ Smooth ○ Skeletal ○ Cardiac 2 1 Characteristics of muscles What do all muscle have in common and what are...
19 | Muscle Microanatomy Agenda Muscle characteristics and function How are different muscle tissues organized? ○ Smooth ○ Skeletal ○ Cardiac 2 1 Characteristics of muscles What do all muscle have in common and what are they used for? 3 Muscle function Movement Maintain posture Joint stability Heat generation 4 Muscles shorten when they are activated. How do muscles get longer? How are they activated? 5 There are three kinds of muscle tissue. ▪ Organismal skeletal ▪ Organ system ▪ Organ ▪ Tissue ▪ Cellular smooth ▪ Organelle ▪ Macromolecules ▪ Molecules cardiac ▪ Atoms 6 Wikimedia Commons 2 Organization of muscle tissues How do differences in muscle tissue structure reflect function? 7 Smooth Skeletal Cardiac Characteristics of skeletal muscle Voluntary Striations Tires rapidly 8 Smooth Skeletal Cardiac 9 Smooth Skeletal Cardiac Muscles are organized into smaller and smaller structures. Muscle Fascicle Fiber (cell) Myofibril Myofilaments 10 Smooth Skeletal Cardiac Muscles are organized into smaller and smaller structures. Muscle Fascicle Fiber (cell) Myofibril Special terms: -sarcolemma 11 -sarcoplasm Smooth Skeletal Cardiac Skeletal muscles have structures that increase responsiveness. Sarcoplasmic reticulum T tubules 12 Summary Muscle characteristics and function Functions and general organization How are different muscle tissues organized? ○ Smooth ○ Skeletal ○ Cardiac Specific structures and histology 13
