The correct answer is: A. Blood vessels.
A glomerulus is a tuft of capillaries that is surrounded by a Bowman’s capsule. The glomerulus and Bowman’s capsule together form a renal corpuscle, which is the functional unit of the kidney. The glomerulus filters blood to produce urine, while the Bowman’s capsule collects the filtrate.
A Malpighian body is a structure found in insects and other invertebrates. It is responsible for excreting waste products from the body. A Malpighian body consists of a glomerulus and a Bowman’s capsule, similar to a renal corpuscle. However, the Malpighian body does not produce urine. Instead, it excretes waste products in the form of uric acid crystals.
A green gland is a structure found in some marine animals. It is responsible for excreting excess salt from the body. A green gland consists of a series of tubules that are lined with cells that have a high concentration of mitochondria. The mitochondria produce ammonia, which is then excreted from the body.
A Malpighian tubule is a structure found in some insects. It is responsible for reabsorbing water and nutrients from the urine. A Malpighian tubule consists of a series of tubules that are lined with cells that have a high concentration of transporters. The transporters reabsorb water and nutrients from the urine, which is then returned to the bloodstream.