Transcript Skeletal System - Ms. Montalbano's 7th grade Science

Skeletal System
Ready, SET,
BONES!!!!!!!
• On your table there is a bag of
bones for you and your partner
to put together.
Did you know????
1. A baby has 300 and an adult
has 206.
2. 14 bones are in your face.
3. 8 bones are in each wrist.
4. 23 bones are in each foot
including the ankle
5. Your bones consist of 50%
water and 50% solid matter.
Function of the skeletal
system
1. Protection: protects many
important organs.
 Ribs protect the heart and the
lungs
 The vertebrae protect the
spinal cord
 The cranium/skull protects the
brain.
2. Movement: Skeletal
muscles are attached to
your bones. Skeletal
muscles pull on bones to
produce movement.
3. Blood cell formationsome bones are filled
with special bone
marrow that makes red
blood cells.
4. Storage: bones store
calcium that help the
nerves and muscles
function properly. Your
bones also store fat that
can be used for energy.
5. Support– the skeletal
system gives structure
and support to your
body, like the framework
of a building.
Types of Joints
Types Of Movable Joints
A joint is a union of two or more bones
(also known as an articulation)
Pivot
Hinge
Top of the neck
Elbow/Knee
Ball & Socket
Gliding
Shoulder/Hip
Intercarpal joints
Immoveable joints are found… in the skull
Lets Review
• Stand up and show
3 people in the room
a pivot joint, a hinge
joint, ball in socket
joint and a gliding
joint.
Types of Bones
Long
Short
Stability with
little movement
Support
Ex- Femur, Humerus
Flat
Ex- Carpals & Tarsals
Irregular
Provides Protection
Ex- Ribs, Scapula
unique shape for
various functions
Ex- vertebrae, mandible
Structure:
BONES!!!
Structure:
Outer Membrane
Bones are connected by…
Connective Tissues
Cartilage
Cushions bones,
allows joints to move easily,
and supports soft tissue
Ligament
Connects
bones to bones
at the joints
Tendon
Connects
muscle to muscle
or
muscle to bone
Types of Fractures
Open Fracture
a fracture that protrudes to the exterior of
the body.
Closed Fracture
A Fracture that does not break
the skin
Greenstick Fracture
Only one side of the bone is broken, mostly seen in
children
Transverse Fracture
Break at a right angle and caused by direct
traumatic injury
Spiral Fracture
Bone broke because of a twisting
type motion.
Skeletal System
Information
Appendicular
System
126 bones
Axial System
80 bones
Conditions of the
Skeletal System
Osteoporosis
Bones become fragile and
more likely to break
Osteoarthritis
Joint disorder where the
cartilage is wearing away