What are the 4 tissue types?
- Epithelial,
- Connective,
- Muscle,
- Nerve.
How do we classify epithelial tissue?
By cell shape & number of cell layers.
Name & describe the different epithelial cell shapes?
- Squamous - Thin & flat.
- Cuboidal - Box shaped.
- Columnar - Tall rectangular.
Give a defintion & an example of Stratified & simple epithelia?
- Stratified - More than 1 layer of cells over the base e.g. skin which is statified squamous cells.
- Simple - One layer of cells on the base e.g. alveoli which is simple squamous.
What are the functions of epithelial tissue (a clue - P, P, S, S)
- P = Protection,
- P = Permeable,
- S = Sensation,
- S = Special Secretory
Epithelial cells attach toether in 3 different ways/junctions, what are they & give an example of where they appear?
- Tight e.g. bladder,
- Anchoring e.g. skin,
- Gap e.g. heart
Epithelial tissue makes up gland but what 2 types of glands are there & what do they do?
- Endocrine - secrete into the interstitial fluid e.g. hormones.
- Exocrine - secrete into ducts that open onto epithelial surfaces e.g. enzymes, like sweat glands, tear ducts.
What is the prupose of connective tissue?
To bind structures together & form a framewor of support.
What are the basic componenets of connective tissue?
- Specialist cells,
- Extra cellular protein fibres,
- Ground substance.
What makes up the matrix of connective tissue?
Cellular fibres + fluid
What specialist cells are always present in connective tissue?
Fibroblasts.
What are the 3 types of protein finbres found in connective tissue?
- Collogen,
- Elastic,
- Reticular
What decides the what type of connetive tissue it may be & what 3 types exist?
The matrix
- Connective tissue proper (soft matrix),
- Fuid connective tissue (fuid matrix),
- Supportive connective tissue (solid matrix).
Give an example of connective tissue proper, fluid & supportive.
Loose or dense, blood or lymph, cartilage or bone.
Cartilage is an example of supportive connective tissue, but what are the different types?
- Hyaline,
- Elastic,
- Fibrocartilage.
Give a definition of a membrane.
A structure formed from epithelial cells supported by connective tissue.
What are the 4 types of membranes & give an example of where they exist?
- Mucous - mouth & nose,
- Serous - pleura of lungs
- Synovial - joints,
- Cutaneous - skin
The skin is a complex layer of epithelium in 5 layers. What are the layers?
- Stratum basale (germinativum),
- Stratum spinosum,
- Stratum granulosum,
- Stratum lucidum,
- Stratum corneum.
What are the 2 types of skin cancer?
- Basal cell carcinoma,
- Malignant melanoma.
Expand on the A-E detection system of cancer.
A = Asymetry
B = Border
C = Colour
D = Diameter
E = Evaluation
