unit b, chapter 3, lesson 1. the skeletal system skull clavicle scapula humerus sternum rib cage...
TRANSCRIPT
The Skeletal System•Skull
•Clavicle
•Scapula
•Humerus
•Sternum
•Rib Cage
•Vertebrae
•Ulna
•Radius
•Femur
•Patella
•Fibula
•Tibia
The Skeletal System
Made up of 206 bones. The bones of the face, skull,
vertebral column and rib cage make up your body’s central framework for support. (Protects vital organs!)
Functions: Supports you Allows you to move Protects vital organs Produces blood cells
Anatomy of a Bone
The Inside of a Long Bone Parts of a Long Bone
Spongy Bone Bone Marrow Compact Bone Periosteum
http://kidshealth.org/misc/movie/bodybasics/bone.html
Support and Movement
Which bones provide support and movement? Bones of the:
Arms Legs Pelvis
They work with muscles to help us move!
http://kidshealth.org/teen/your_body/body_basics/bones_muscles_joints.html
Important “Bone” Terms
Cartilage: a strong flexible tissue on the ends of some bones It provides a cushion
where bones come together.
Ligaments: strong cords of tissue that connect the bones in your joints.
How do our bones move?
Joint: a point at which two bones meet.
Without joints, you could not move. Three main kinds of joints:
Hinge Joint Ball and Socket Joint Fixed Joint
Joints
Types of Joints Movements Locations
Hinge JointAllows back and forth movement.
Elbow, Knees
Fixed JointNo movement is allowed.
Plates of the skull
Ball-and-Socket JointAllows a wide range of movements.
Shoulder, Hip
Skeletal System Problems
Scoliosis Photograph of someone with scoliosis.
Causes: deformity of the spine win which the spine develops an S-shaped curve when viewed from behind.
Can this affect you? Affects 2% of women and .5% of men in the general population
Skeletal System Problems
Osteoporosis Osteoporosis Fact!
A disease in which bones become thin and brittle.
Who does this affect? 55% of people who are
over the age of 55. Of the 10 million
Americans who have this disease, 8 million are women and 2 million are men.
(from http://www.nof.org/osteoporosis/diseasefacts.htm)
About 85-90% of adult bone mass is acquired by age 18 in girls and 20 in boys. Building strong bones during childhood and adolescence can help to prevent osteoporosis later in life.
(from http://www.nof.org/osteoporosis/diseasefacts.htm)
Skeletal System Problems
Sprain What happens when you sprain your ankle?
Stretching or partial tearing of ligaments.
Can be painful and cause swelling around the injured joint.
http://yucky.discovery.com/flash/body/yuckystuff/anklesprain/js.index.html
Caring for your Skeletal System Exercise regularly using weights,
walking, running, jumping rope, dancing, hiking, soccer, or basketball (just to name a few activities!).
Wear proper fitting shoes. Select foods and beverages rich in
calcium, phosphorus, and vitamin D. Sit, stand, and walk with correct
posture. Participate in screenings for scoliosis.