Bones
What are the two groups of bones?
Axial and Appendicular Bones
How many muscles do you have in your body?
a) Less than 100.
b) 100 - 200
c) 200 - 300
d) 300 - 400
e) 400 - 500
f) 500 - 600
g) More than 600
h) All of the above.
i) None of the above.
g) More than 600
What do joints do?
Joints are where two bones meet. They help with movement. Joints allow our bodies to move in many ways.
What is the largest organ in your body?
Your skin is the largest organ in your body.
What is the subcutaneous layer of skin for?
The subcutaneous layers stores fat, absorbs shocks, and helps the body stay warm.
What are the three main jobs of a bone?
To protect, support, and allow movement.
What are the three types of muscles?
1. Voluntary Muscles
2. Cardiac Muscles
3. Smooth Muscles
The joints in your elbow and knee, are like what object that you most likely encounter every day?
A door hinge (hinge joint).
Name the order of the layers of skin. (from the bottom up)
1. Subcutaneous
2. Dermis
3. Epidermis
Where does the hair on your skin start growing from?
The hair on your skin starts growing from the subcutaneous layer and grows through the dermis and epidermis layers.
What makes a bone a bone?
A bone must have bone marrow to heal itself back together.
Where are your smooth muscles located?
Smooth muscles are located in your stomach, intestines, and bladder.
What are the six common types of synovial joints?
1. Pivot Joint
2. Hinge Joint
3. Plane/Gliding Joint
4. Ball-and-Socket Joint
5. Saddle Joint
6. Condyloid Joint
What is your epidermis layer made up of?
Your epidermis layer is made up of dead cells. Dead cells keep out germs and bacteria.
What shape does your vertebral column form when you are growing? And, why?
It becomes "S" shaped. It is needed for balance when walking. Only babies - of a very young age - actually have straight backs.
How do you keep your bones strong?
Eat lots of food with calcium, vitamins, protein, and minerals. Get lots of exercise and sleep.
How much of your body weight is muscles? (in percentages)
25% - 45%
Explain what it means to be double-jointed.
Double-jointed means having ligaments that are looser than most people. This allows you to do things other people can't.
How are organs formed?
Organs are formed by groups of similar tissue, and tissue is made out of a group of alike cells that do the same job.
What are growth plates for?
Growth plates are found at the end of each bone. They produce cartilage, that will be mineralized to form more bones. Some cartilage will not be mineralized but instead forms soft spots like in your nose.
What are the jobs of bone marrow?
a) Produce bone marrow.
b) Produce red blood cells.
c) Produces platelets.
d) Produces fat.
e) Stores fat.
f) It creates fluid to digest food.
g) The strong part of your bone.
h) A, B, and C
i) B, C, and E
j) A, D, and F
k) A, B, and G
l) C, E, and F
m) All of the above.
n) None of the above.
i) B, C, and E
How do your voluntary muscles know when to move?
The brain sends a message - through the spinal cord - to the nerves.
Nerves contract the muscle you want to move.
Sensors in muscles send a message back to the brain.
Result: Smooth, coordinated movements.
What is another name for the condyloid joint?
The ellipsoidal joint.
How does your brain know that your skin has touched something cold, hot, etc.?
Nerve endings in your dermis layer send messages to your brain.
Why aren't teeth bones?
Teeth do not have bone marrow, which makes them unable to heal themselves back together.