Chapter 42: Gas Exchange and Circulation
Diffusion-✔✔ ________ αt the respiratory surface, where 02 moves from
1e air or water into the blood and C02 moves from 1e blood into 1e air or
water, along their concentration gradients.
tiny sacs-✔✔ The lungs of mammals, in contrast, are finely divided into
________ called alveoli.
cellular respiration-✔✔ In tissues, where ________ has led to low 02
levels and high C02 levels, gas exchange occurs between blood and cells.
thin muscular sheet-✔✔ The change in volume is caused by a downward
motion of the ________ called the diaphragm and an expansion of the rib
cage.
Solubility-✔✔ ________ of the gas in the aqueous film lining the gas
exchange surface.
blood cells-✔✔ White ________ (also called leukocytes) are part of the
immune system.
tube-✔✔ A(n) ________ known as the trachea (not to be confused with
the tracheae of insects) carries the inhaled air to narrower ________ called
bronchi.
Platelets-✔✔ ________ are cell fragments that act to minimize blood loss
from ruptured blood vessels.
interstitial fluid-✔✔ A(n) ________ that enters the lymphatic ducts is called
lymph.
Lungs-✔✔ ________ are internal organs that are used for gas exchange.
Diffusion-✔✔ ________ αt the respiratory surface, where 02 moves from
1e air or water into the blood and C02 moves from 1e blood into 1e air or
water, along their concentration gradients.
tiny sacs-✔✔ The lungs of mammals, in contrast, are finely divided into
________ called alveoli.
cellular respiration-✔✔ In tissues, where ________ has led to low 02
levels and high C02 levels, gas exchange occurs between blood and cells.
thin muscular sheet-✔✔ The change in volume is caused by a downward
motion of the ________ called the diaphragm and an expansion of the rib
cage.
Solubility-✔✔ ________ of the gas in the aqueous film lining the gas
exchange surface.
blood cells-✔✔ White ________ (also called leukocytes) are part of the
immune system.
tube-✔✔ A(n) ________ known as the trachea (not to be confused with
the tracheae of insects) carries the inhaled air to narrower ________ called
bronchi.
Platelets-✔✔ ________ are cell fragments that act to minimize blood loss
from ruptured blood vessels.
interstitial fluid-✔✔ A(n) ________ that enters the lymphatic ducts is called
lymph.
Lungs-✔✔ ________ are internal organs that are used for gas exchange.
