Cellular Respiration
All living things must carry out the process of
What is cellular respiration
In the protists the exchange of gases occurs across
What is the plasma cell membrane
Humans are ________________ organisms
What are aerobic organisms as they require oxygen for cellular respiration
Air enters the body through the
What is the nose
This thick sheet of muscle separates the chest cavity from the abdominal cavity
What is the diaphragm
All organisms that carry out cellular respiration have to exchange the gases
What are oxygen & carbon dioxide
(O + Co)
The exchange of gases in the hydra takes place directly between the
What are the body cells and environment
The cellular waste product ___________________ must be removed from the human body.
What is carbon dioxide
The cells of the nasal cavity secrete
mucus - it keeps the nasal passages moist.
The process of breathing occurs in two parts
What are inhalation - drawing air in and
exhalation - expelling air from the lungs
The mechanism of the exchange of respiratory gases is
What is diffusion
The earthworm uss one part of it's body as a respiratory surface
What is it's skin
The respiratory surface in the human body
What are the lungs
From the nasal cavity air enters the pharynx, or throat, The pharynx opens into two tubes the esophagus and the
What is the trachea
The exchange of oxygen and carbon dioxide between the air in alveoli and the blood in the capillaries
What is external respiration
The walls of a respiratory surface must be
What is thin walled - so diffusion occurs readily and quickly
If an earthworm is exposed to the air for long periods of time the skin
What is dries out and the earthworm will suffocate.
Tiny sacs with in the lungs
What are alveoli
The trachea leads down from the pharynx to the
What is the chest cavity
The exchange of oxygen and carbon dioxide between the blood and the body cells is
What is internal respiration
A respiratory surface must be moist so that
oxygen and carbon dioxide can dissolve into the water
The grasshopper exchanges respiratory gases with the environment through small openings on its side and a system of tubes called
What are Tracheal Tubes
The respiratory system utilizes the _______________ system
What is the circulatory
In the middle of the chest, the trachea divides into two cartilage-ringed tubes called
What are bronchi
Oxygen is carried in the blood by the
What is the hemoglobin molecule