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Chapter 6 Blue Book

Chapter 6 Blue Book. Structure and Movement. 5 Functions of The Skeletal System. 1. The skeleton give shape and support to your body. 2. Bones protect your inner organs. 3. Major muscles attach to bones and help them move. 4. The bone marrow makes blood cells.

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Chapter 6 Blue Book

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  1. Chapter 6Blue Book Structure and Movement

  2. 5 Functions of The Skeletal System • 1.The skeleton give shape and support to your body. • 2. Bones protect your inner organs. • 3. Major muscles attach to bones and help them move. • 4. The bone marrow makes blood cells. • 5. Store minerals like calcium and phosphorus.

  3. Muscular System • Muscles are organs that relax and contract to all movement. • Muscles always work in pairs • Voluntary muscles – muscles you can control. Arms, legs, etc. • Involuntary muscles – muscles you can’t consciously control. Heart, digestive system, etc.

  4. Types of Muscle Tissue • 1. Skeletal muscles: • move bones. • Voluntary muscles. • They are attached to the bones by tendons. • Most numerous muscles in the body. • These muscles are “striated”; they looked striped in the microscope. • Contract quickly and tire easily.

  5. Muscle Types (cont’d) • 2. Smooth muscle: • Involuntary muscles • Moves internal organs • Contract and relax slowly • Not striated • Intestines, blood vessels, bladder, etc.

  6. Muscle Types (cont’d) • 3. Cardiac muscle: • Found only in the heart. • Involuntary • Striated • Contracts about 70 times per minute. • 4,200 x each hour • 100,800 x each day • 36,792,000 x each year • 2,759,400,000 x during the average life expectancy of 75 years old!

  7. Skin • The skin is the body’s largest organ! • Made up of 2 layers: epidermis is the outer layer, dermis is the inner layer. • The dermis is thick and contains many blood vessels, nerves, oil and sweat glands. • People that gain excess weight have their fat deposited here.

  8. Skin Functions • 5 functions of the skin: • Protection from physical or chemical injury, diseases, and excess water loss. • Sensory organ – temperature, pressure and pain. • Makes vitamin D. • Regulates body temperature • Excrete wastes.

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