Answer:
An aphthous ulcer is an ulcer that forms on the mucous membranes. They are also called aphthae, aphthosis, aphthous stomatitis and canker sores. ... Recurrent aphthous ulcers are mostly a minor nuisance, but they are associated with significant health problems in some people.
1.firefighter 2.plumber 3. Electrician
4. Gardner 5.welder 6.pipe fitter 7.Mason
8. Fencer 9.blacksmith 10. Makeup artist 11.seamstress 12.painter 13.drafter 14.surveyor
15.butcher 16. Pastry chef
Answer:
Explanation:
Active - the process of exposing the body to an antigen. Exposing the body will generate an adaptive response that takes a few days or weeks to develop and can be life long lasting.
Passive - it is provided when we are given antibodies to disease. Instead of producing the antibodies with the immune system, they are given. Like a newborn baby acquires immunity from the placenta.
Natural - it works to fight off pathogens before they begin an active infection. Sometimes it is not enough to stop the pathogen or the pathogen exploits the immune response and gets to the cells.
true. Nicotine patches have been shown to improve patients states of depression, but only in short term.