I think it is part of the digestive system.
Circulatory
The lymphatic system defends the body against disease by producing lymphocytes. It also absorbs lipids (fats) from the intestines and delivers them to the blood.
i think your fat comes from all of the foods in your body in digestive system.
The body system that the liver is a part of is the digestive system. The liver produces bile, which aids in digestion by emulsifying fats.
The circulatory system distributes digested fats, including fatty acids and glycerol, primarily through the lymphatic system and then into the bloodstream. After digestion in the intestines, fats are absorbed by the intestinal cells and reassembled into triglycerides, which are packaged into chylomicrons. These chylomicrons enter the lymphatic system and eventually merge into the bloodstream via the thoracic duct, allowing the fats to be transported throughout the body.
It enters however you take the drug. But once it is in your body, it bonds to fats and can stay in the system for months.
The same way any muscle works - electrical impulses from the brain stimulate the muscle to move.
The endocrine system in frogs produces hormones that regulate functions in different parts of their bodies. These hormones control processes such as metabolism, growth, and reproduction in frogs.
fat provides warmth and it stores nutrients in case the body needs them.
Enzymes called lipases help break down fats in the digestive system. These lipases work by breaking down fats into smaller molecules that can be easily absorbed by the body. Consuming a balanced diet with adequate amounts of lipase-containing foods can also support the breakdown of fats in the body.
They release energy after the body digests it and the leftover fats build up.
Well.... The frog needs nutrients in order to survive. When the frog would eat its food, the food would go down through the digestive system, where obviously the food would break down. Then the circulatory system would take the broken down food and spread the nutrients that were taken from the food, all across the frogs body. So the main answer is that a frogs digestive and circulatory system are important for its survival because the frog needs nutrient given to its body. The two systems work together to break down the food and spread the nutrients across the frogs body. - This was the way I answered a question on my lab.