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The Skeletal System

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Eliot Conway

on 20 January 2014

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Transcript of The Skeletal System

Skeletal System
David Kim, Kaylynne MacDiarmid, Samantha Salmon, Eliot Conway
Why is the skeletal system important?
The skeletal system is important because it helps support the body. If we did not have bones, our bodies would collapse and we would be unable to move, it also holds up your organs and tendons. Without that we would just be a puddle of skin and guts on the floor.
How many bones are in the human body?
Why do adults and babies have different numbers of bones?
What would happen if humans didn't have bones? What do bones do?
In a fully grown person there are 206 bones, in children and infants there are over 270 bones. Babies have more bones because when we are first born our bones aren’t fully formed and starting at the age of 2 our bones begin to fuse together.
Diagram of a human skeleton
Why do we need calcium, and how do we get it?
Calcium is necessary in the development and maintenance of strong bones and teeth. Calcium continues to strengthen and build the bone mass of humans until the age of 20-25, at which point it is used mainly to promote the upkeep of said bone mass. Almost all calcium in our body is stored in our bones and teeth, where it supports their hardness and strength. Calcium is found in many foods.
What is the longest bone in your body and where is it located?
Calcium is found in ...
Milk, yogurt, cheese, fish with soft bones you can eat. Most grains, while not being very rich in calcium, are beneficial because of the massive amount eaten. For example, pasta isn't very rich in calcium, but because of how much people eat of it they get a nice dose of calcium. Some breakfast cereals, as well as some fruit, soy, or rice beverages have calcium added.
The longest bone in the body is called the Femur bone. It is located in the thigh bone and is 51cm long. The shortest bones in the body are called Strapes. They are located in the ear and are 0.23-0.33cm long. Most of the bones in the body are located in the vertebral column (the spine). At birth we start off with 33 bones but over time they fuse, resulting in only 26 bones in the adult vertebral.
How do your bones move?
We have muscles attached to our bones, when the muscles contract the bones of which they are attached to move. We also have joints that help with the flexibility of our bones movements. The joints allow our bones to bend and move back and forth.
Are your bones alive?
Find 10 Fun Facts about bones that people might not know! (First 5)
What happens to bones if you use tobacco products?

i) The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments and cartilage that connects them.

ii) Your teeth are part of the skeletal system, but they are not considered bones. They are made up of dentin and enamel.

iii) Human Osteology is the study of bones and teeth.

iv) The skeletons of adult males and females have some variation, primarily to accommodate childbirth. The female pelvis is flatter, more rounded and proportionally larger. A male's pelvis is about 90 degrees or less of angle, whereas a female's is 100 degrees or more.

v) While they become brittle when outside of the body, bones are very much alive inside the body, being fed by a network of blood vessels from the circulatory system and nerves from the nervous system.

Tobacco causes the body to lose calcium which leads to a decrease in bone density, which can lead to osteoporosis. People who have smoked compared to non-smokers end up with less bone mass. The toxic chemicals in tobacco also caused an upset of hormones in our body which also leads to bone loss. Nicotine harms the cells that make the bones so it is more difficult for a person who has smoke to heal from a fracture.
Last 5 Fun Facts
vi) In adults both the foot and the spine have 26 bones

vii) A human foot has 26 bones, 33 joints, 107 ligaments, and 19 muscles and tendons. The bones in your feet make up 25% of all the bones in your body.

viii) The skeletal system has 2 distinctive parts: the axial skeletal and the appendicular skeletal.

ix) Orthopedics is the medical specialty responsible for treating entire skeletal system.

x) In 1949, H. Lowry Rush (1879-1965) uses stainless steel pins to treat long bone fractures for the first time.
What happens when you sprain your ankle?
A sprained ankle is caused when ligaments in your ankle are damaged by the twisting of your joint. Most sprained ankles are usually inward twists, damaging the outer ligaments. Spraining inner foot ligaments is rare. While some sprains can be very painful, the speed of onset and severity of the sprain vary greatly. The pain of the injury isn’t always a measurement of the damage. Rather, swelling is a good measurement of the damage. A large amount of rapid swelling usually indicates severe damage. Swelling is caused by internal bleeding of the damaged tissue. Gravity draws this blood down away from the site of trauma, causing swelling and bruising. So, swelling and bruises will usually be a small distance away from the damaged tissue.
Google Images
What happens to bones if you drink alcohol?
People who drink a lot of alcohol are more likely to get osteoporosis.

With osteoporosis, our bones become weak and are more likely to break.
Watch this video:
Where are the smallest bones in your body located and where are the majority of your bones located?
What is the soft stuff in the middle of your bones and what does it do?
Yes, your bones are alive. The stuff that is in the middle of your bones are the Bone Marrow. It is the flexible tissue in the interior of bones.

There are two types of Marrows and they are red marrow, which consists mainly of tissue in which new blood cells are formed, and yellow marrow, red marrow creates red blood cells and, yellow marrow creates white blood cells.
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