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4 Primary Tissue types (Muscle
movement + generation of heat
excitable
…
4 Primary Tissue types
Muscle
movement + generation of heat
- excitable
- contractile = movement
- stability
- heat generation
Skeletal (voluntary)
- striations
- cylindrical cell shape
- long fibres
- several nuclei in one cell (peripheral of the cell mb)
Cardiac (involuntary)
- striations
- branching cell shape
- short fibres
- ONE nucleus per cell (central)
- Intercalated discs
Smooth (involuntary)
- absence of striations - not arranged in regular patterns
- fusiform cell shape (wider in middle)
- short fibres
- ONE nucleus per cell (central)
Nervous tissue
communication + control
-
-
Epithelium
covering (epidermis) + lining body surfaces
- Apical - closer to the lumen
- basal - basement mb (basal lamina)
- Avascular (does not have own blood supply)
- regenerative
Create a selective barrier bw external enviro and underlying tissue
- absorptive
- secretory
- protective
- sensory activities
# of layers
- single
- stratified = multiple layers
shape of the cells (top layer)
- squamous (flat)
- keratinised - resist force
- non-keratinised - live cells on top of the layer
- cuboidal (cube)
- columnar (columns) - nucleus on the basement
- transitional
- multi-layer = stratified
- BI-NUCLEATE cells
pseudostratified -> ONLY one single-layer
Cilia
- taller, wider
- move things across
Microvilli
- shorter
- increase SA = increase capacity to move substances across the mb
Fibrous CT
Loose CT (Areolar)
Collagen fibres
- very strong
- high tensile strength
- NOT elastic
Elastic fibres
- capacity to stretch and recoil
Dense CT
Dense regular
- tendons / ligaments / aponeuroses
- bind organs together
Dense irregular
- dura mater (brain)and spinal cord
-
Connective tissue
support / protection / binding / insulation / transport
- cells (separated by extracellular matrix)
- matrix
- fibres (proteins)
- ground substance
-