Body Tissues Flashcards
1
Q
Examples of body tissues?
A
- connective tissue -everything else
- nervous tissue - signals throughout the body
- muscle tissue- movement/ relaxation
- epithelial tissue - lining, outside skin
2
Q
What are epithelium tissue cells composed of?
A
Composed of cells that unite to form a layer
- can be single layers or multiply layers
3
Q
What is cancer (a tumour) ?
A
- a mass of cells, dividing excessively
4
Q
What is a cancerous cell?
A
A cell that: has stopped responding to regulatory signals that control cell division
- the cells may fail to attach to each other in
5
Q
What can tumours be?
A
BEGNIN OR MALIGNANT
6
Q
What is the difference between begnin and malignant?
A
Malignant tumours spread through the body and form secondary tumours,begnin tumours are non cancerous
7
Q
Causes of cancer?
A
- ionising radiation (x-rays, gamma- rays, radioactive substances)
- UV radiation (sun beds, sunlight)
- chemicals ( tobacco smoke contains over 50 known carcinogens, asbestos, benzene)
- viruses
- poor diet
- inheritance
- hormones
