The correct answer is (a.) liver. The liver contains the tubules with sinusoids which is lined with macrophages that leads to the central venous structure. A liver is a vital organ that serves as a gland that plays an important role in animal's and vertebrae's metabolism.
<span>this is caused by a disease called basal cell carcinoma, because it causes ulcers and is slow to metastasize. Years of exposure to sunlight probably caused his cancer.</span>
