Risks. 1  Stroke. Both ET and EPT increase the risk of stroke. That risk goes away, however, soon after you stop taking hormones. 2  Blood clots. Risk increases if you take hormones by mouth. The risk may be lower if you use a transdermal estrogen, such as a patch, gel, or spray. 3  Uterine cancer.
A earthworm does not have a skeleton. It has bristles on each segment called setae that help the earthworm move. Earthworms have no limbs. The earthworm has two sets of muscles; one that makes it long and thin and one that makes it fat.t eats dirt, digesting the plant and animal matter in the dirt and then eliminates the rest. It has an esophagus for the food to go down, a crop to store the food in, a gizzard that grinds the food down, intestines for the food to pass through and take out nutrients and an anus for the food to come out.
We will use in the earthworm as our model animal, an Oligochaete (Evolutionary school-subclass, phylogenetic school, not sure), belonging to the class or clade Clitellata, or Annelids with a clitellum, a swelling towards the head of the animal. The other two major clades are the Polychaeta and Echiura.e will be comparing the earthworm to a typicalleech, (Subclass Hirudinea), also a Clitellate. The Hirudinea resemble the oligochaetes in their major habitats (fresh water and land) as well as in lack of parapodia and reduction of specialized head structures that we will find in the Polychaeta.