1 / 11

The Effects of Hazardous Materials on the Body

The Effects of Hazardous Materials on the Body. What risks?. Toxicity: the ability of a substance to cause dangerous effects Factors relating to toxicity: Dose Length of exposure Route(s) of entry. Routes of Entry. Inhalation: Breathing in of contaminant

aliza
Download Presentation

The Effects of Hazardous Materials on the Body

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Effects of Hazardous Materials on the Body

  2. What risks? • Toxicity: • the ability of a substance to cause dangerous effects • Factors relating to toxicity: • Dose • Length of exposure • Route(s) of entry

  3. Routes of Entry • Inhalation: • Breathing in of contaminant • Can affect soft tissues of respiratory system • Lung damage • Lower breathing capacity • Trigger onset of chronic disease (ie; cancer) • Can become systemic (throughout body) • Passes through lung tissue into blood stream

  4. Inhalation Example 1 - Asbestos • Fibres act like ‘fish hooks’ on lung tissue • Never go away • Trigger lung cancer (80% fatality rate)

  5. Inhalation Example 2 - Mycosis • Fungal growth in lung tissue • Inhibits respiration • Toxic by-product causing tissue damage

  6. Routes of Entry • Absorption: • Contamination by contact • Can cause rashes, burns, infection, ect • Can become systemic

  7. Absorption Example: Mercury • Absorbed in tiny droplets through skin tissue • Travels through body and destroys nervous (brain) tissue

  8. Routes of Entry • Ingestion: • Swallowing or eating • Can be direct contact (swallowing on its own) • Can be indirect (ingesting contaminated food/drink)

  9. Ingestion Example: Lead • Ingestion damages many body systems and organs • Can cause pain, developmental disorders, seizures and death • Contaminant in soil and water (contaminated veggies and fish)

  10. Common Ways Chemicals Enter Body • Air: • Mist, dust, gas, vapours • Usually enter indirectly (ie; dirty hands, air currents) • Can be odourless/colourless and undetected • Liquids: • Improper handling • Dust absorbed by sweat or by moist eye surface • Transfer across placenta (pregnancy)

  11. Exposure • 2 types: Acute: • Short term • Rapid effects Chronic: • Repeated exposure • Delayed effects

More Related