tissue Flashcards
What is connective tissue composed of?
1) cells
2) extracellular matrix
- -> fibres, ground substance
What are some connective tissue cells?
1) Blasts - create matrix
2) clast - break downs ECF
3) cytes - maintain the ECF
What are the fibers of connective tissue and how are the classified
1) collagen
2) reticulin
3) elastin
- based on appearance and biochemical characteristics
characteristics of collagen
- most common body protein
- tensile strength
- coarse wavy bundles
characteristics of Reticulin
fine branched network
characteristics of elastin
stretching and returning to its original state
What is the classification of fibrous connective tissue
1) loose
2) dense
Example of loose CT?
1) Loose ordinary - collagen not organized (aerolar tissue)
2) adipose tissue - storage form of energy and insulation
3) reticular - supporting framework
Example of dense CT?
Dense irregular
- -> Collagen > reticulin, elastin
- -> e.g. dermis , fascia
Dense regular
- -> collagen is arranged in 1 direction
- -> tendon, ligament
What are specialized connective tissue?
BBC
1) Blood
2) bone (vascular)
3) cartilage (avascular)
What is the component of cartilage
- chondrocytes found in pair or 4
- Lacunae(cell membrane) surround the chondrocytes
- ECF: amorphous gel
What are the types of cartilage?
1) hyaline cartilage: supports tissue
- -> trachea
2) elastic cartilage: many elastic fibre, allows retention of shape
- ->ear
3) fibrocartilage: many collagen for strength
- ->joint
what is the function of amorphous gel?
- strong enuff –> bear weight
- liquid enuff –> allow passage of metabolites
What is the different between bone ECF and cartilage ECF?
- bone contains more CA as the ground substance
- cartilage contains more amorphous gel as the ground substance
What are the type of bones
1) compact (dense)
2) cancellous (sponge like)
What are 3 types of muscle
- striated voluntary (skeletal)
- striated involuntary (cardiac)
- Non-striated involuntary (smooth)
Characteristics of striated voluntary?
- cross striation: overlapping of actin and myosin filaments
- long, multi nucleated cells
- voluntary (under conscious control)
Where is striated muscle located?
limbs, torso , tongue
Characteristics of striated involuntary
- shorter, mononucelus cell joined by intercalated disc (branching)
- highly vascular
- involuntary (ANS)
Where is striated involuntary located?
heart
Characteristics of smooth muscle
- no cross-striation
- cell spindle shaped, non-branching , central nucleus
- involuntary (ANS)
Function of the integumentary system
1) protection
2) thermoregulation
3) synthesis of vit d
4) blood resorvior
5) absorption and secretion
6) sensation
What are the 2 main components of the skin
1) epidermis (avascular)
2) dermis (vascular)
What is below the dermis ?
hypodermis
