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Skeletal System

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by

mehdi bayani

on 11 April 2016

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Transcript of Skeletal System

The Functions:

Your saddle joint allows you to move
your wrist back and forth. It attaches
your hand to your arm.
Your plane joint allows your foot
to rotate, or move up and down. It
attaches your foot to your leg.
The ball and
socket joint
attaches your leg to your pelvis. This allows you to lift your leg.
Inside a bone
There are nine parts of the inside of the bone.
Did you know:
All mammals share the
same bone structure???
As you can see in the
picture to the right, the

Now you know!
purple is the humerus,
green is radius,
red is ulna,
Comparison
blue are the carpals,
Whale Skeleton
Human Skeleton
yellow are the metacarpals,
and orange are the
phalanges.
A
B
Venn Diagram
Mostly the same bones
Support the skin and organism
Much larger than a human skeleton
Not adapted for life in water
Whale Skeleton
Human Skeleton
C
Summary
As you can see, the Skeletal System is an amazing system that all of us have. With the help of our joints we are able to move. The skeletal system allows us to do everyday activities, like walking and talking. If we did not have a skeletal system, we would basically be a blob of skin and tissue.
The Skeletal System
`
Our bones can't move on their own, so they move on our joints. Our joints are the things that we can feel when you bend your elbow or knee. There are many joints in the body that help us move. So I suggest you consider the following:
Question Round!
What is the scientific name of the joint that connects your arm to your shoulder?
The Answer is.....
Ellipsoidal Joint!!
Ellipsoidal Joint!!!!
Learning Outcome:
Students will learn about the function of the system
the students will learn about the different components
Students will learn about the different types of bones
Quiz
How many bones are there in the adult body
a) 158 bones
b) 206 bones
c) 220 bones
d) It varies on each individual
Which of the following statement is INCORRECT?
a) Bone is where most blood cells are made.
b) Bone serves as a storehouse for various minerals.
c) Bone is a dry and non-living supporting structure.
d) Bone protects and supports the body and its organs.

What is the function of a tendon?
a) To link bones to bones
b) To link muscles to bones
c) To link muscles to ligaments
d) To bind the cells in compact bone closer together
The purpose of the rib cage is to...
a) protect the stomach
b) protect the spinal cord
c) protect the heart and lungs
d) provide an object to which the lungs can attach
What makes bones so strong?
a) Silica
b) Cartilage
c) Blood and marrow
d) Calcium and phosphorous
Support
Protection
Skull-protects brain
Thorax-protects heart and lungs
Movement-
Muscles attached to bones & when they contract, it causes movement
Storage
- Calcium & Phosphorus
Hemopoiesis
- blood cell formation in red bone marrow
Types of Bones:
Long- Humerus (upper arm)
Short- Carpal ( Wrist)
Flat- Frontal (Skull)
Irregular Vertebrae (spinal bones)
Components of the Skeletal System
Cartilage
Bones
Joints
Ligaments (bones to bone)
Tendons (Muscle to bone)
Function
Storage
Bone matrix can
store calcium
and is involved in calcium metabolism, and bone marrow can store iron in ferrotin and is involved in iron metabolism.


Blood cell production
The skeleton is the site of haematopoiesis, the development of blood cells that takes place in the bone marrow.


Protection
The skeleton protects many vital organs:

The skull protects the brain, the eyes, and the middle and inner ears.
The vertebrae protect the spinal cord.
The rib cage, spine, and sternum protect the lungs, heart and major blood vessels.
The clavicle and scapula protect the shoulder.
The patella and the ulna protect the knee and the elbow respectively.
The carpals and tarsals protect the wrist and ankle respectively.
Movement
The joints between bones allow movement, some allowing a wider range of movement than others, e.g. the ball and socket joint allows a greater range of movement than the pivot joint at the neck.
Movement is powered by skeletal muscles, which are attached to the skeleton at various sites on bones.
Muscles, bones, and joints provide the principal mechanics for movement, all coordinated by the nervous system.
Support
The skeleton provides the framework which supports the body and maintains its shape.
The pelvis, associated ligaments and muscles provide a floor for the pelvic structures. Without the rib cages, costal cartilages, and intercostal muscles, the lungs would collapse.
Classification
Axial skeleton (80 bones)
bones of the head, spine, ribs, and breastbone

Appendicular skeleton (126 bones)
limbs, the pelvis, the shoulder blades, and the collarbones

Condyloid Jiont
Hinge Joint
Cartilage
Cartilage Is a tough, fibrous connective tissue located at the end of bones and between joints. It protects bones by absorbing the impact experienced in movements such as jumping.

Ligaments
Ligaments cross over joints, joining bone to bone. They are slightly elastic and allow small movement from the bones of the joint. The main function of ligaments is to provide stability at the joint, preventing dislocation. If ligaments are seriously damaged in an accident, they may not be able to repair themselves and may require surgery.

Tendons
Tendons are inelastic and very strong, allowing movement by helping muscles pull through the joint and on the bones. They connect muscle to bone by
origin
and
insertion
connection
Skeletal Labeling Activity
Home Work:
Complete Skeletal labeling activity
Full transcript