Unit 3 Skeletal Sytem Flashcards
What are the parts of the skeletal system made up of?
Connective tissues that consist of living cells surrounded by an extracellular matrix.
True or false - the extracellular matrix of all of the different types connective tissues of the skeletal system are made of the same type of fibers.
False
Different types of connective tissue are made up of different types of fibers.
What are the two hallmarks of connective tissue?
- Extracellular matrix
- Variations in blood supply
What are connective tissues made of?
- Many different types of cells
- Varying amounts of a nonliving substance found outside the cells
Which connective tissues have a poor blood supply?
Tendons and ligaments
Which connective tissue is avascular (has no blood supply).
Cartilage
What causes tendons, ligaments and cartilage to heal slowly?
Poor blood supply
What is bone tissue called?
Osseous tissue
What are bone cells called?
Osteocytes
What are the two basic components of the bone structure?
- Osteocytes (bone cells) that sit in cavities called “pits” or lacunae
- Matrix composed of calcium salts and a large number of collagen fibers surrounds the “pit”
What gives bone its strength?
Calcium salts combined with a large number of collagen fibers
True ar false - cartilage is less hard and more flexible than bone
True
What are the cells that make up cartilage called?
Chondrocytes
What are the three types of cartilage?
- Hyaline cartilage
- Fibrocartilage
- Elastic cartilage
What is two other names for dense connective tissue?
- Dense regular tissue
- Irregular fibrous tissue
What are the components of dense connective tissue?
- Collagen fibers (main matrix element)
- Rows of fibroblasts between the collagen fibers
Describe the characteristics of dense connective (irregular fibrous) tissue.
Strong ropelike structures that withstand tension in one direction
Where is dense connective tissue found in the body?
In the dermis of the skin
Describe loose connective tissue
Relatively softer with more cells and fewer fibers than other tissues (excluding blood)
What are three types of loose connective tissue?
- Areolar
- Adipose
- Reticular
True of false - blood is considered a connective tissue
True
What is the skeletal system?
The framework of the body
What are the different components of the skeletal system?
- Bones
- Cartilage
- Joints
- Ligaments
What two parts is the skeletal system divided into?
- Axial skeleton
- Appendicular skeleton
What makes up the axial skeleton?
The bones that form the logitudinal axis of the body
What makes up the appendicular skeleton?
The bones of the limbs and girdles that attached them to the axial skeleton
What part of the skeletal system gives it flexibility and allows movement to,occur?
Joints
