Diffusion & Osmosis
Diffusion & Osmosis in the Body
Examples of Diffusion and Osmosis in the Body
These cases include the following processes:
- Circulation
- Respiration
- Excretion
Circulatory System
- Circulatory System - "An organ system that permits blood to circulate and transport nutrients to and from the cells in the body. Systems are made up of blood vessels (blood cells and platelets) and the heart.
- The following path is that of the blood in the circulatory system: (Enter-right, exit-left)
- The body does it this way because the returning blood is low in oxygen; meaning it needs to to be full in O2. The left side of the heart then returns it full of oxygen.
- For more info: www.wikipedia.org
Respiratory System
- Respiration depends heavily on the process of diffusion - movement of a substance from a region of high concentration to a region of low concentration.
- The following path is how air goes into the lungs:
- The lungs are lined with mucus to help with air (gas) exchange.
Kidney Excretion
- Kidneys are a versatile organ.
- They filter blood plasma by separating wastes from chemicals, regulate blood volumes and blood pressure, produce hormones, regulate blood pH, and excretion.
- Overall, the kidneys are responsible for keeping blood clean (filtering) and regulating for body processes.
- Your kidneys take in blood from the renal artery, where it is cleaned.
- The blood is returned to the heart also by the renal artery.
- For more info: www.wikipedia.org
Homeostasis in the Body
- Homeostasis occurs in multiple systems of the body.
- Internal constant environment; state of equilibrium
- A trait in all living systems.
- All the systems in the body work together to perform specific roles.
Osmosis Conditions/Environments
The following 3 types of external environments can affect the internal environments:
- Isotonic: (cell stays normal)
- Hypertonic: (cell shrinks)
- Hypotonic: (cell swells)
Osmosis & Diffusion Overview
- Diffusion happens in an area of high concentration and ends in an area of low concentration.
- Diffusion is a form of passive transport (no energy).
- EXAMPLE: Diffusion- When Co2 leaves the bloodstream and O2 enters.
- Type of diffusion: also known as Osmosis.
- Osmosis is the movement of water from areas of high concentration to the area of low concentration.
- EXAMPLE: Osmosis- Egg Experiment, weight vs. salinity.