Muscular System PowerPoint PDF

Muscular System Maria DiLuigi, MSEd, CDA, RDH  Introduction Gives us ability to stand, walk, run, jump, make facial expressions Composed of over 600 individual muscles Muscles work together to produce movement Each muscle contains: Muscle tissue Connective t...

Muscular System Maria DiLuigi, MSEd, CDA, RDH  Introduction Gives us ability to stand, walk, run, jump, make facial expressions Composed of over 600 individual muscles Muscles work together to produce movement Each muscle contains: Muscle tissue Connective tissue Nerve tissue Blood vessels  Skeletal Muscle Also called "striated" muscle Attaches to bones to enable voluntary movement Has striped appearance under microscope Under conscious control Example: moving your arms and legs  Smooth Muscle Found/lines internal organs, blood vessels, glands No striped appearance Involuntary - not under conscious control Produces slow, sustained contractions Example: moving food through digestive tract  Cardiac Muscle Forms walls of the heart Striated appearance but involuntary like smooth muscle Extremely durable - beats 4 billion times in a lifetime Fibers connect to create supportive network  3 Types of Muscle Striated Skeletal Voluntary Movement Muscle Tissue Smooth, no stripes Smooth Involuntary Movement Striated Cardiac Involuntary Movement Muscle Origin & Insertion Origin: where muscle begins/attaches to less movable part -Usually closer to body's midline Insertion: where muscle ends/attaches to more movable part -Usually farther from body's midline Anterior Key Muscles Visible: Pectoralis major (chest) Rectus abdominis (abs) Biceps brachii (upper arm) Quadriceps (thigh) Posterior Key Muscles Visible: Trapezius (upper back) Latissimus dorsi (mid-back) Triceps brachii (back of upper arm) Gluteus maximus (buttocks)  Muscles of the Head & Neck Function: Frontalis- Raises eyebrows, wrinkles forehead Masseter-Closes jaw Orbicularis oculi- Closes the eye Orbicularis oris- Puckers the lip …..and more but you will RESEARCH the rest for your project!  Muscles of the Tongue Intrinsic muscles: Within the tongue itself Extrinsic muscles: Connect tongue to other structures Important for speech, swallowing, and oral hygiene Muscle Function: Contraction & Relaxation Muscles are the only body tissue that can contract and relax Contraction: muscle becomes shorter and thicker Relaxation: muscle returns to original shape Muscles work in opposing pairs When one contracts, the other relaxes  Muscle Function Relaxation Contraction -Muscles relax (lengthen) to allow -Shorten to produce movement movement in the opposite direction -Uses energy in the form of ATP -Requires less energy than contraction -Triggered by nerve signals Importance of Muscle Health Muscular System and Exercise Different types of exercise affect muscles differently: Aerobic exercise improves muscle endurance Strength training increases muscle size and power Flexibility exercises enhance muscle elasticity  Muscles and Posture Muscles play crucial role in maintaining good posture Core muscles (abs, back) particularly important Poor posture can lead to muscle imbalances and pain  Oral Muscle Exercises Can improve muscle tone and function Useful for patients with certain conditions (e.g., bruxism) May be recommended as part of treatment plans Ergonomics in the Dental Office Proper posture and positioning to reduce muscle strain Important for both dental professionals and patients Can prevent long-term muscular issues  Muscles and Aging Natural loss of muscle mass and strength with age (sarcopenia) Can be slowed with regular exercise and proper nutrition Maintaining muscle health important for independence in older age Can affect oral health and dental care May require adjustments in treatment approaches  Thanks Do you have any questions? Please keep this slide for attribution CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, infographics & images by Freepik Icon pack