Atapeworm is an organism that lives inside the intestines of larger animals, including man, and absorbs nutrients from its host. this type of symbiotic relationship is called

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

characteristics of hydrocarbons