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The Human Skeletal System - 7th Grade
Transcript of The Human Skeletal System - 7th Grade
Functions of Bones
of the body
of soft organs
due to attached skeletal muscles
of minerals (like calcium) and fats
Bones of the Human Body
-Bones connect to other bones through joints.
-Joints are usually surrounded by cartilage and ligaments.
Goes on page 41 in your ISN
Parts of the skeletal system
Fibrous tissue, harder than cartilage.
Helps connect and hold most bones to each other.
Where can you find cartilage on your body?
Types of Bone Cells
Mature bone cells
Located inside the spongy part of our larger bones.
Produces all of your
red blood cells
, and most of our
white blood cells
The skeleton has 206 bones.
Two basic types of bone tissue.
Compact /Cortical bone
Outer layer (shell) of the bone. Very hard, very dense.
Inner layer of the bone, not very dense, lots of empty space. In certain bones, this is where blood is manufactured.
Soft connective tissue made of collagen fiber.
As an embryo, our entire skeleton was made of cartilage, most of which was replaced with bone.
In mature humans, cartilage is found near and around bones.
You can find cartilage in your nose and ears.
List some functions of our bones
What are the parts of the skeletal system?
What are the two types of bone tissue?
Types of Joints
There are 6 types of joints
allow bone to move back and forth (fingers, elbows, knees)
allow bone to move back and forth and side to side (Thumb)
allow bone to rotate almost freely (hips and shoulders)
allow bones to rotate, but not as well as Ball-and-Socket (neck)
allow bones to move side to side or front to back (ankles and wrists)
very little to no movement (skull)
Levers allow you to do more work using less force/power
A lot of our joints form natural levers, allowing our bodies to do more and perform efficiently.
What are joints for?
What are the different types of joints?
Why do we need levers in our body?
What are ligaments for?
What are bone cells called?
What are bone forming cells called?
What are bone destroying cells called?
Why do we need bone marrow?
On page 40 use the provided model (or draw your own!) of the human skeleton, than label the largest bones and bone groups (20 labels)
The process of bone creation is called