Decreased phagocytosis and TNF-α production from young AMs compared to Adult AMs. AMs were harvested from adult (~10 weeks old) and young (day 7 and 14) rats and allowed to adhere overnight. A. AMs were given an opsonized target and the amount of ingestion of the target was quantified after 90 mins. Data represents the mean ± SEM from 4 independent experiments preformed in quadruplicate (*p < 0.05 and **p < 0.01 when compared to adult AMs). B. Supernatants were collected from AM cultures and the amount of TNF-α was measured by a specific EIA. Data shown are representative of three independent experiments preformed in triplicate (***p < 0.001 when compared to adult AMs).