It's called hypoxemia, it's low levels of oxygen in the blood, to be more specific, it's oxygen loss in your blood from your arteries. It can cause respiratory disorders, and tissue hypoxia, as a result of the blood not providing much oxygen to your body.
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Between a New Moon and a First quarter Moon.
(And I think when the entire face of the moon is completely illuminated. But I'm unsure about this part.)
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Common examples of social issues: Poverty and Homelessness, Climate Change, Civil Rights and Racial Discrimination, etc.
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There's so much more examples of social issues down the list, but that'll take to long, these are enough for now.
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The special cells of the sponge include those that filter sea water; cells that are phagocytic (that engulf and digest food particles); those that form the external 'skin', breathing pores and tubes through which water enters and leaves the body; and those that secrete the mineral and organic skeletons, called spicules and fibres, respectively. Sponges are also unique because nearly all their cells can change function as required (totipotency).
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