Muscular

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Muscular Integumentary Systems
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Muscular System

• Muscles are the motors that move body parts
• Bones and joints
• have no power to
• move on their own
• More than 600
• muscles in the body
• 35-40 of body mass
• is muscle

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Muscular System

• Muscleorgan that contracts and becomes shorter
• Result body parts move, energy is used, work is
  done

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Muscular System

• 2 Groups of Muscle
• Voluntaryyou can control
• these
• Arms, legs, hands, face
• Involuntaryyou cant control
• these, dont have to decide to
• make these muscles work
• Muscles around heart

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Muscular System

• 3 Types of Muscle Tissue
• Skeletal muscle
• Most numerous in body
• Looks striped (striated)
• Attached to the bones by
• tendons
• Tendonsthick bands that pull on
• the bone as the muscle contracts
• Voluntary
• Contract quickly, tire easily

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Muscular System

• 3 Types of Muscle Tissue
• Smooth muscle
• Involuntary
• Found in walls of stomach,
• intestine, uterus, etc.
• Contracts and relaxes slowly
• No striations

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Muscular System

• 3 Types of Muscle Tissue
• Cardiac muscle
• Only found in heart
• Involuntary
• Has striations
• Contracts 70 times per minute (heartbeat)

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Muscles at Work

• Skeletal muscle movements are results of pairs of
  muscles
• working together
• 1 muscle contracts while
• the other muscle relaxes
• Muscles always pull,
• they never push

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Muscles at Work

• Results of muscle action
• Muscles contract
• Chemical energy is converted to thermal energy
• Chemical energy comes from glucose
• Thermal energy produces heat that helps keep body
  temperature constant

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Muscles at Work

• Results of muscle action
• Over time, muscles become larger or smaller,
  depending on how much work they do

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Integumentary System

• The bodys largest system skin, hair, nails,
  sweat and oil glands
• Largest organ in
• the body skin

(oil gland)
(sweat gland)
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Integumentary System

• Skin is made up of 2 layers
• Epidermis surface
• layer
• Cells on top are dead
• New cells are
• constantly produced
• at the bottom
• Cells produce
• melanin (pigment
• that gives you skin
• color)

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Integumentary System

• Skin is made up of 2 layers
• Dermis layer under
• epidermis
• Thicker than
• epidermis
• Contains blood
• vessels, nerves, oil
• and sweat glands
• Fat cells stored
• under the dermis

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Integumentary System

• 5 Functions of Integumentary System
• Forms a
• protective
• covering over
• the body

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Integumentary System

• 5 Functions of Integumentary System
• Maintains
• homeostasis
• regulates body
• temperature

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Integumentary System

• 5 Functions of Integumentary System
• Excretes wastes
• sodium chloride
• (salt), water, urea

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Integumentary System

• 5 Functions of Integumentary System
• Sensory organ
• nerve endings are
• sensitive to
• temperature,
• pressure,
• touch

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Integumentary System

• 5 Functions of Integumentary System
• Produces
• vitamin D in
• the epidermis
• using
• sunlight