Concentric contractions: A concentric contraction is a type of muscle contraction where the length of the muscles shorten while undergoing tension. For example, when you pick up a curl bar and perform a biceps curl, the length of your biceps muscles shorten.
Blood in Baby's Stool. Babies can sometimes have blood in their stool that is caused by food allergies, a small anal tear or fissure, or even a temporary case of lactose intolerance. It might even be a drop of blood that came from a cracked nipple, which the baby then passed through his system.
There are many possible causes of blood in the catâs feces, some of which include: Parasitic infection (cryptosporidium, intestinal worms) Cryptosporidium causes inflammation which leads to bleeding, parasitic worms such as hookworm or roundworms suck the blood from the intestinal wall, resulting in blood in the stool.