The lungs contain air sacs called alveoli which are surrounded by blood capillaries to allow gaseous exchange.
The capillaries absorb oxygen at the lungs. This occurs near the alveoli.
Carbon dioxide is produced as a waste product of respiration, and is taken in the bloodstream to the capillaries outside the lungs, where the CO2 diffuses into the alveoli of the lungs.
greater concentration of oxygen in the air sacs of the lungs than in the capillaries.
Microcirulation consists of terminal arterioles connected to capillaries. The capillaries are connected to post-capillary venules which are connected to the veins,
oxygen
yes capillaries are connected to heart because heart is a muscular organ and the exchange of materials between heart walls and blood occurs through capillaries.
capillaries
It diffuses because the concentration of oxygen in the capillaries is lower than the concentration of oxygen in the air (law of diffusion).
It enters through the capillaries of the lungs.
Carbon dioxide is exhaled
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Capillaries are the blood vessels that surround the alveoli, or air sacs, in your lungs. These capillaries are the site of gas exchange.