Final answer:
The adult human liver stores iron for use in various bodily functions, with an entire iron content of approximately 4 to 5 grams in a normal adult. Various foods can provide the necessary intake, however, only about 10% of ingested iron is absorbed, while the liver stores and manages the body's iron homeostasis.
Step-by-step explanation:
The adult liver contains a significant amount of iron, which is essential for many biological functions including oxygen transportation and enzyme reactions. Total iron content in a normal adult is approximately 4 to 5 grams, and the liver plays a crucial role in iron metabolism and storage. The liver stores iron chiefly in two forms, ferritin or hemosiderin, for future use in various bodily processes such as the synthesis of hemoglobin.
Iron intake is critical for maintaining proper bodily functions, and various dietary sources like red meat, shellfish, and nuts are recommended for fulfilling the recommended daily intake of approximately 1 mg/day for adults. However, only about 10% of ingested iron is absorbed. Moreover, the liver's ability to store and release iron as needed is vital for maintaining iron homeostasis within the body.
Excretion of iron through urine, bile, feces, and sweat is also minimal, with a daily estimate of roughly 1 mg in adult males, and extra losses through menstruation in women. Thus, the liver's role in iron storage and regulation is integral to health.