Causes of Piriformis Syndrome. Piriformis syndrome is caused by overuse of the piriformis muscle in the buttocks. Tight adductor muscles on the inside of the thigh exacerbate piriformis muscle inflammation and accompanying bursitis.auses of Piriformis Syndrome. Piriformis syndrome is caused by overuse of the piriformis muscle in the buttocks. Tight adductor muscles on the inside of the thigh exacerbate piriformis muscle inflammation and accompanying bursitis.
Escherichia coli, one of the many species of bacteria present in the human gut. Gut flora (gut microbiota, or gastrointestinal microbiota) is the complex community of microorganisms that live in the digestive tracts of humans and other animals, including insects. The gut metagenome is the aggregate of all the genomes of gut microbiota. The gut is one niche that human microbiota inhabit.
The gastrovascular cavity is a structure found in primitive animal phyla. It is responsible for both the digestion of food and the transport of nutrients throughout the body. The cavity has only one opening to the environment. Food goes in and waste comes out that same opening, making it a two-way digestive tract.rimitive animals have body plans that are very different from ours. Animals such as jellyfish, corals and flatworms have a much simpler way to handle the digestion of food, as well as the circulation of nutrients around the body. Learn about the structure and function of the gastrovascular cavity in these organisms.