Further, absorption can be done by active transport or passive transport. Assimilation. The absorbed simple molecules are now in the blood stream, and they are distributed to all the cells in the body. Assimilation is converting these molecules and integrating them with the living tissues.
With proper timing of the contrast-agent bolus, a thrombus in a large vessel is seen as a soft-tissue filling defect in rare cases. Small-bowel obstruction can cause vessel obstruction and lead to ischemia, which often is apparent as dilated loops on CT scans.
Dogs (and cats) are victims of several internal parasites frequently referred to as worms. The most common are the roundworms, hookworms, whipworms and tapeworms. Of these four only two are commonly seen in the stool with the unaided eye: roundworms and tapeworms. Most worm infestations cause any or all of these symptoms: diarrhea, perhaps with blood; weight loss; dry hair; general poor appearance; and vomiting, perhaps with worms in the vomit.