Your spine, or vertebral column is the row of bones that runs along the centre of your back. Your spine is made of lots of small bones called vertebra.
The spleen is an organ located inside the abdomen. The spleen is part of the immune system, and its job is to filter old and abnormal blood cells from the blood stream.
Your stomach is an organ where your food first goes when you eat. The general area of your body where your stomach is can also be called your stomach, belly or tummy.
Stretch marks are small lines that appear on the skin of people whose bodies have gone through a rapid change, such as growth, pregnancy or weight gain. Stretch marks are usually pink or purple when they appear and fade to silver or white after time passes.
Stubble is the short stalks left when a crop like wheat has been harvested. Stubble is also used to describe other things that look like grain stubble, like the short hair on a man'schin that you can see a little while after he has shaved.
When you are very hot or have been doing a lot of exercise, you sweat. Sweat is a saltyliquid that comes out of your skin. When air blows across the sweat it evaporates and dries out, and as this happens it cools you off.
