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8.1 The Task of respiration

Expectations

  • Describe gas exchange in simple organisms
  • Explain why some organisms do not need specialized respiratory systems
  • List the respiratory adaptations that enable organisms to live on land
  • Describe the main types of animal respiratory systems


Points Neicole will be presenting


Oxygen is necessary to carry out cellular respiration, the process that releases the energy needed to drive all cell functions. The basic function of the respiratory system is to make sure O2 can enter each cell in the organism. Every cell must rid itself of CO2, CO2 is the waste product of cellular respiration This is known as the process called gas exchange.

CO2 is the waste product of cellular respiration The task of ventilating a respiratory surface with air is called breathing.

Every respiratory system has 2 requirements:


1.Surface area- the area for gas exchange must be big enough for the exchange of O2 and CO2. The reason for this is to occur at a rate that will meet the organisms metabolic needs.

2.Respiration must take place in a moist environment: that way O2 and CO2 are dissolved.

Most single-celled aerobic organisms do not require a specialized respiratory system. Ex: algae, fungi, and some bacteria They rely on diffusion to meet their gas exchange

Single-celled organisms require moist environments They are found in aquatic environments or moist places such as the body of a host organism (moist areas within the body)


Gills are a respiratory structure found in many aquatic animals , they are feathery structures made up of many fine filaments lines with capillaries.

When gills are exposed to water gases are exchanged across the thin gill membrane.


The larger the organism the more O2 required.

An animal respiratory system includes a respiratory surface

Aerobic requires O2 to survive.





5 main points for 8.1


The are two types of animal respiratory systems.

1. Specialized Respiratory

2.The Tracheal Respiratory


An animals respiratory system includes a respiratory surface, passageways that connect this surface to the external environment, muscular structures used to help the respiratory medium to the respiratory surface.


Every Respiratory system has 2 requirements


  • Surface are and a moist environment


Most single celled organisms do not require a specialized respiratory system.

They rely on diffusion to meet their gas exchange.


Oxygen is necessary to carry out cellular respiration, the process that releases the energy needed to drive all cell functions.


CO2 is the waste product of cellular respiration.