Renal vein carries away the filtered blood from the kidneys. Nephron is the structural and functional unit in kidneys. Each nephron is made up of 2 main parts: malphigian body and renal tubule. Malphigian body comprises a cup-shaped Bowman's capsule and a network of blood capillaries, the glomerulus. The renal artery, after entering the kidney, divides and redivides forming various afferent renal arterioles. An afferent arteriole enters a Bowman's capsule to form glomerulus. The efferent renal arteriole has narrower lumen than the afferent renal arteriole. Thereafter, an efferent renal arteriole leaves the glomerulus. The efferent renal arteriole breaks up into capillaries around the tubules. All the capillaries, in turn, unite to form renal venules and the latter together form the renal vein, which leaves the kidney. Thus, after the process of filtration in the glomerulus, renal vein has the clean or filtered blood.

This is the correct option. Renal arteries carry blood containing waste into the kidneys. Renal veins drain pure blood out of the kidneys after filtration. Ureters are the tubes that carry urine from the kidneys to the bladder.

This is the correct answer as some plant waste gets stored in fruits of plants in the form of solid bodies. Raphides are needle-shaped crystals of calcium oxalate as monohydrate or calcium carbonate as aragonite, found in more than 200 families of plants.

This is the correct answer is tracheids are long and thin. They transport water.

Stomata are minute aperture structures on plants found typically on the outer leaf. They are also known as the epidermis.

The process of passing out of urine from the body is known as micturition.

The aorta is the largest artery in human body. It originates from the left ventricle of the heart and extends down to the abdomen.

The normal systolic pressure is about 120 mm Hg. 

A glomerulus, plural glomeruli, is a knot of extremely tiny blood vessels involved in filtering the blood to form urine. There are many glomeruli inside the kidney, each contained within a capsule known as Bowman's capsule.

Statement 4 is incorrect as phloem is the living tissue that carries organic nutrients in plants.

Inferior vena cava brings deoxygenated blood from lower and middle parts of the body for its purification.

Transportation of water in rooted plants is always unidirectional.

The atrioventricular node is located on the right side of interauricular septum.

Heart beats seventy-two times per minute. It represents the number of double circulations of blood from heart to lungs to heart and then to the body.