Physiology - Homeostasis • 9a. Know how the complementary activity of major body systems provides cells with oxygen & nutrients & removes toxic waste such as CO 2 • 9b. Know how the nervous system mediates communication between different parts of the body & the body’s interactions with the environment. • 9c. Know how feedback loops in the nervous & endocrine systems regulate conditions in the body.
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Physiology - Homeostasis• 9a. Know how the complementary activity of
major body systems provides cells with oxygen & nutrients & removes toxic waste such as CO2
• 9b. Know how the nervous system mediates communication between different parts of the body & the body’s interactions with the environment.
• 9c. Know how feedback loops in the nervous & endocrine systems regulate conditions in the body.
What is Homeostasis?
• The body maintaining a CONSTANT internal environment or steady state, even though things are changing!
• Body Systems that are regulated: Circulatory Respiratory Digestive Nervous
Circulatory & Respiratory Systems
• The respiratory system brings oxygen to the circulatory system (which distributes it to our body) and removes carbon dioxide from the circulatory system via diffusion
Gases Exchanged via Diffusion
• Diffusion – flow from an area of high concentration to low concentration
• Oxygen goes from our lungs to our heart (blood) where diffusion occurs between oxygen & carbon dioxide, which is brought back to the lungs