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A nutrient that the body cannot synthesize, but instead must get from a balanced diet, is said to be ____________.

The healthy level for hematocrit in females is _____.

Antibodies that attack pathogens are produced by ______.

The end products of fat digestion are converted into ________ within epithelial cells and move into the ________ of villi.

B cells that respond to the same antigen and are derived from a single cell are referred to as ______.

Only lymphocytes possessing ________ that can bind with the ________ on an invading pathogen are involved in the immune response against it.

The most superior portion of the stomach is the __________.

________, a localized response to infection, attracts leukocytes to the affected tissues to destroy the pathogens.

The folds in the mucosa and submucosa of the stomach which allow it to expand as it fills with food are the __________.

About 23% of the CO2 in the blood is transportedas ______.