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What are you looking at?!?. THE MUSCULAR SYSTEM. 1.5. 9/4/2014. Today’s Warm-up. Muscle Trivia… How many muscles are in the average adult human body? What is the strongest muscle in the body? What is the largest muscle in the body?. Approximately 650.

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today s warm up
Today’s Warm-up
  • Muscle Trivia…
  • How many muscles are in the average adult human body?
  • What is the strongest muscle in the body?
  • What is the largest muscle in the body?

Approximately 650

Debatable, but many say the masseter (jaw).

The gluteus maximus in your rear end (buttocks).

today s warm up1
Today’s Warm-up
  • Here’s one strong dude…
  • In control of both his skeletal and muscular systems…

Amazing Strength BreakDancing

today s objectives
Today’s Objectives
  • Intro to the muscular system- definitions and functions
  • Categories of muscle:
    • Voluntary
    • Involuntary
  • Types of muscle:
    • Skeletal
    • Smooth
    • Cardiac
  • How exactly do muscles work?
  • BrainPop and/or Video segment
slide5

Muscular System

  • Categories
  • of Muscles
  • I. Voluntary
    • a) Skeletal
  • II. Involuntary
  • a) Smooth
  • b) Cardiac

Notes

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Summary of the notes and information learned

why and what
Why and What
  • There are over 600 muscles in the human body!
  • They are responsible for a variety of functions, including movement & maintaining body temperature.
  • Even while you sleep there are muscles in your body at work.
  • There are 2 categories and 3 types of muscle, but all are made of the same material, a type of elastic tissue (a little like a rubber band).
  • A muscle is defined as an organ that can relax, contract, and provide the force to move your body parts.
categories of muscles
Categories of Muscles
  • Some muscles (skeletal muscles) will not contract unless stimulated by neurons (nerve cells). They are called voluntary muscles.
  • Other muscles (smooth & cardiac muscles) will contract without nervous stimulation but their contraction can be influenced by the nervous system. They are called involuntary muscles.
  • The nervous and muscle systems are closely interconnected.
what are muscles made of
What are muscles made of?
  • Thousands, or even tens of thousands, of small fibers make up each muscle.
what are muscles made of1
What are muscles made of?
  • You have three different types of muscles in your body:
  • skeletal (skeh-luh-tul) muscle
  • smooth muscle
  • cardiac (kar-dee-ak) muscle
skeletal muscle
Skeletal Muscle
  • Attached to bones; moves skeleton
  • Also called striated muscle (because of its appearance under the microscope, looks as if it has “stripes”)
  • Skeletal muscles are voluntary muscle
skeletal muscles
Skeletal Muscles
  • Skeletal muscles attached to bones by tendons (connective tissue) and enable movement.

Feel the back of your ankle to feel your Achilles tendon- the largest tendon in your body.

smooth muscles
Smooth Muscles
  • Smooth muscles are involuntary.
  • They are usually in sheets or layers, with one layered upon another.
  • It gets its name because no striations “stripes” are visible in them.
examples of involuntary smooth muscles
Examples of Involuntary/Smooth Muscles
  • The smooth muscle controls the movements of internal organs, such as the movement of food through the digestive system.
  • Many parts of the body contain smooth muscles: the intestines, the lungs, the bladder, and the walls of the blood vessels…
cardiac muscle
Cardiac Muscle
  • Muscle of the heart
  • Involuntarymuscle
  • Also known as myocardium
how the heart is different
How the Heart is Different
  • How is the heart different from other muscles?
    • It is part of both the Muscular System and the Circulatory System.
    • It is responsible for circulating blood throughout the body.
    • It has its own pacemaker for rhythmic beating.
looking at all three types of muscles
Looking at all three types of muscles
  • Striated or Skeletal Muscles are characterized by dark bands (striations).
  • Smooth Muscles are characterized by layers.
  • Cardiac Muscles are characterized by a little of both.

Voluntary:

under your control

Involuntary:

can work on its own

Involuntary:

can work on its own

how do muscles work
How do muscles work?

Remember, muscles can only pull, not push!

today s objectives1
Today’s Objectives
  • Intro to the muscular system- definitions and functions
  • Categories of muscle:
    • Voluntary
    • Involuntary
  • Types of muscle:
    • Skeletal
    • Smooth
    • Cardiac
  • How exactly do muscles work?
  • BrainPop and/or Video segment
slide26

Muscular System

  • Categories
  • of Muscles
  • I. Voluntary
    • a) Skeletal
  • II. Involuntary
  • a) Smooth
  • b) Cardiac

Notes

Notes

Notes

Notes

Notes

Notes

Notes

Notes

Notes

Notes

Summary of the notes and information learned