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Science.7
The Skeletal System
Name ______________________________
Date _______________________________
Reading & Questions
Essential Questions
1. What are the structures of the skeletal system?
2. What is the function of the skeletal system?
3. How do we move?
Vocabulary
bone, ligament, bone
marrow, joint, cartilage
Objectives
1. Identify the structures of the skeletal system.
2. Identify the function of the skeletal system.
What is the Skeletal System?
The skeletal system is all of the bones in the body and the tissues such as
tendons, ligaments and cartilage that connect them. There are 206 bones
in your body. Your teeth are a part of your skeletal system but they are
not counted as bones.
How does the Skeletal System help us?
Support
The main job of the skeleton is to provide support for our body.
Without your skeleton your body would collapse into a heap. Without
bones you'd be just a puddle of skin and guts on the floor.
How does your skeleton support your body?
Protection
The skeleton protects your internal organs and fragile body
tissues. The brain, eyes, heart, lungs and spinal cord are all protected by
your skeleton.
What does the skeleton protect?
Movement
Your bones are levers which are pulled by your muscles to cause movement. Muscle and bone are
connected by tendons. A joint is found where two or more bones connect. Joints make movement
possible. Ligaments hold bones together at the joints. Cartilage is a flexible tissue that helps to cushion
joints so that bones do not rub together.
What is a joint?
What is a ligament and where is it found?
What is cartilage and where is it found?
What are bones made of?
There are two kinds of bone tissue, compact bone and
spongy bone. Compact bone is dense and spongy bone
contains many open spaces. Blood vessels run through
compact bones and supply them with nutrients. Bone
marrow inside long bones produces blood cells and stores
fat. Bones also store calcium.
*Do You Remember?
Ca element #20 on the Periodic Table.
What are bones made of?
Are bones alive? How do I keep my bones healthy?
Yes, bones are alive. They are made of living cells and they need regular exercise. Walking, jogging,
running and other physical activities are important in keeping your bones strong and healthy. Strengthen
your skeleton by drinking milk and eating other dairy products (like low-fat cheese, frozen yogurt, and ice
cream). They all contain calcium which helps bones harden and become strong.
How can you keep your bones healthy?