Urine leaves the body through urethra.

Bile ducts carry bile from liver and gall bladder to duodenum.

Fungi are saprophytes. They feed on dead and decaying organic matter.

Gastric glands are present in stomach. The gastric juice secreted kills harmful bacteria that enter with the food.

Transportation of water and minerals occurs through xylem.

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.

Pituitary gland is a pea-sized structure located at the base of the brain.

Pepsin is an enzyme that breaks down proteins into smaller peptides. It is produced in the stomach and is one of the main digestive enzymes in the digestive system.

Statement b is not correct as saliva destroys the germs that cause tooth decay.

All the three factors affect photosynthesis.

A tube that connects pharynx and larynx to lungs is known as trachea.

Alveoli are the tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and the bloodstream.