1. The Skeletal and muscular systems
Unit B, Chapter 3, Lesson 1
The Skeletal and muscular systems

2. The Skeletal System Skull Clavicle Scapula Humerus Sternum Rib Cage
Vertebrae
Ulna
Radius
Femur
Patella
Fibula
Tibia

3. 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

4. Anatomy of a Bone The Inside of a Long Bone Parts of a Long Bone
Spongy Bone
Bone Marrow
Compact Bone
Periosteum
movie/bodybasics/bone.ht ml

5. Support and Movement Which bones provide support and movement?
Bones of the:
Arms
Legs
Pelvis
They work with muscles to help us move!
asics/bones_muscles_joints.html

6. 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.

7. 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

8. Joints Types of Joints Movements Locations Hinge Joint
Allows back and forth movement.
Elbow, Knees
Fixed Joint
No movement is allowed.
Plates of the skull
Ball-and-Socket Joint
Allows a wide range of movements.
Shoulder, Hip

9. Problems and Caring for the Skeletal System

10. 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

11. 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
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 orosis/diseasefacts.htm)

12. 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.
/flash/body/yuckystuff/ankl esprain/js.index.html

13. 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.