Test 1-T3 Flashcards
Skeleton structure
Check the diagram
Shape
If we did not have bones our body shape would be like jelly and squishy without form.
Protection
Our bones protect soft tissues and your muscles, as well as vital organs.
Movement
Our skeleton helps us move by working together with muscles and attach the bones and muscles.
Storage
A skeleton stores minerals and calcium.
Production
The skeleton produces bone marrow.
Two parts
Axial- 80 bones
Appendicular- 126 bones
How many bones in the human body?
The human body has 206 bones.
What are bones made of?
Bones are made of:
-> bone marrow + calcium + phosphorus + sodium + collagen
WhT are the 5 types of bones?
Long Short Irregular Flat Sesamoid
What do the axial and appendicular systems do?
Axial provides protection. Appendicular allows movement.
Muscles structure
Refer to diagram
There are more than…
650 muscles in the human body.
Muscles are attached to the bones by…
Ligaments
All muscles work by…
Contracting (pulling).
Muscles cannot push
Muscles always work in…
Pairs
While one muscle is contracting the other is relaxing.
When muscles contract they…
When muscles relax they…
Become shorter and fatter.
Become longer and thinner.
When the forearm is raised…
When the forearm is lowered…
The biceps contract and the triceps relax.
The biceps relax and the triceps contract.
What is a ligament?
Ligaments are bands of soft, flexible tissues that hold bones together.
What are joints?
What protects your bones?
A joint is where two bones come together.
Cartilage
-> smooth slippery surface that cushions the impact of movement.
Synovial fluid.
-> allows bones to slide over freely.
