Examlex
An atom of fluorine contains nine electrons.How many of these electrons are in s orbitals?
Epithelial Tissues
Tissues that form the outer surface of the body and the lining of the digestive, respiratory, urinary, and reproductive systems.
Secretions
Substances produced and released by cells or glands in the body, such as saliva, mucus, or hormones.
Down Syndrome
A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, characterized by physical growth delays, characteristic facial features, and varying degrees of intellectual disability.
Live Births
The birth of a baby that shows any sign of life, such as breathing, heartbeat, or voluntary muscle movements, after separation from the mother's body.
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