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Where in the circulatory cyctem does nutrients enter and wastes leave the tissues?
The capillaries are the site in the circulatory system where nutrients enter and wastes leave the tissues. The thin walls of the capillaries facilitate this diffusion.
How long is blood in lung capillaries in contact with air?
Blood in the capillaries are never in direct contact with air. Blood in contact with air is called bleeding. Oxygen, carbon dioxide (and other gases) diffuse across the alveolar and capillary walls to enter the blood stream (and leave).
What causes oxygen to enter and carbon dioxide to leave the capillaries?
Oxygen and carbon dioxide get into and out of cells via diffusion. The gases diffuse across the thin capillary wall, and then diffuse across the cell membrane.
Describe several ways in which gases enter and leave the atmosphere?
By air
The holes in a leaf where gases enter and leave?
Stomata (stoma)
What blood vessels do the exchange of gases occur?
the blood vessel which allows gas exchange to occur is the capillaries
How does oxygen enter the capillaries?
Oxygen enter the capillaries by diffusion due to difference in oxygen concentrations.
What is the use of the capilaries?
The capillaries are the site of diffusion of wastes, oxygen, and nutrients. This allows these materials to enter and leave body tissues.
What is the system by which gases enter and leave the body called?
The system by which gases enter and leave the body is called the respiratory system. It includes organs such as the lungs, nose, and trachea that work together to allow for the exchange of oxygen and carbon dioxide between the body and the environment.
What blood vessels permit the exchange of nutrients and gases between blood and tissue?
Capillaries
What does oxygen enter a cell by?
capillaries
Name gases e and f which enter and leave the lungs?
Oxygen (O2) and Carbon Dioxide (CO2) =)
