6.5 - The Skeleton and Bone Tissue - The Human Skeleton Flashcards
1
Q
How many bones in an adult human?
A
126
2
Q
Why does our number of bones decrease with age?
A
Because some of our bones fuse together, leading to less total bones.
3
Q
What are the six functions of the skeleton?
A
- Protection
- Support
- Movement
- Mineral storage
- Blood cell production
- Fat (energy storage)
4
Q
What are the five types of bone? What is this classification based on?
A
- Short
- Long
- Flat
- Sesamoid
- Irregular
5
Q
What is a long bone?
A
A bone that is longer than it is wide
6
Q
What is a short bone?
A
Cube-like in shape; equal in dimensions
7
Q
What is a flat bone?
A
Thin; often curved
Useful for protection of organs, often attached to muscle.
8
Q
What is a sesamoid bone?
A
Bones that form from within a tendon (e.g. patella)
9
Q
What is an irregular bone?
A
No clear characteristics in shape
