Transcript Muscles & Bones

• What is important to know about muscles?
– Muscle contracts to move bones and body parts.
– Muscles pull never push.
– Muscles look either striated or smooth:
• Striated muscle has stripes or striations in it.
• Smooth muscle does not.
• Also, muscles are labeled as either voluntary or involuntary.
– Voluntary muscles are muscles that you can move whenever you want to.
– Involuntary muscles contract and relax automatically inside your body. We can
not control our involuntary muscles.
– Muscles will either contract (shorten) or relax (lengthen)
Muscle Contracts & Relaxes
Three Types of Muscle
• Skeletal Muscle
• Cardiac (Heart) Muscle
• Smooth Muscle (Digestive System)
Skeletal System
• Adults have 206 bones
• Hard on the outside and spongy tissue
inside.
• Spongy tissue produces blood cells.
Skeletal System
• Joints:
– Are places where one
bone meets another.
• Connectors:
• Cartilage:
– Connecting tissue that
covers ends of bones and
supports certain structures.
– Three major types of
• Ligaments:
joints:
– Connecting tissue that
• Hinge (elbow)
hold bones in place at
• Pivot (Neck)
joints.
• Ball & Socket (Hip &
Shoulder)
• Tendons:
– Connecting tissue that
move bones when muscles
contract.
• Tendons & Ligaments
Ball & Socket Joint
Hinge Joint
Pivot Joint
• Human Body Adventure - Muscles Self-Quiz