Examlex
How would the geometry of a Universe with Ωₒ greater than 1 differ from one with Ωₒ less than 1?
Endocytosis
A cellular process in which substances are brought into the cell by engulfing them with the cell membrane.
Alveoli
Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Capillaries
Small blood vessels in the body's circulatory system that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.
Active Transport
The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, using energy usually in the form of ATP.
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