Medieval knights often wore armor to protect themselves from arrows and swords. Just like that armor, your subcutaneous tissue, though not nearly as clunky, works around the clock to protect not only your bones, but also your inner organs and delicate tissues that make up the soft parts of your body.
If sports are more your thing, think about subcutaneous tissue in terms of the pads a football player dons before a big game. Sandwiched between the outer layers of skin and the underlying muscle and bones, it is there to offer your insides additional protection against potential injuries [source: P&G]. Since it is mostly made of fat, it is spongy and resilient. You'll no doubt appreciate this extra cushion next to your bones the next time you take a tumble.
Besides providing protection, the hypodermis also sees to it that your internal temperature is not overly hot or overly cold. The subcutaneous tissue works with the blood vessels that run through it to keep your temperature normal and consistent [source: WebMD]. The sweat glands that exist at this level of skin help keep you cool in the summer. This internal cooling system can help your body deal with anything from a hot afternoon in the sun to a fever caused by sickness.
Unfortunately, as you get older, your subcutaneous tissue begins to thin out. As a result, the loss of extra insulation can put you at risk to extreme temperatures and injury from falls [source: MedlinePlus]. Hypothermia becomes more of a threat because aging skin is not as efficient as younger skin in maintaining body temperature. You sweat less due to loss of subcutaneous tissue -- and this makes it harder to keep cool [source: MedlinePlus]. Also, since certain medications are absorbed through subcutaneous tissue, this can affect how your body reacts to those medicines.
To learn more about subcutaneous tissue and how it benefits your body, visit the links on the next page.