The Digestive and Excretory Systems

It provides enzymes to digest all sorts of food.

Step 1: The pancreas is a gland that works alongside the small intestine. Step 2: It produces special chemicals called ENZYMES. Enzymes are substances that speed up chemical reactions in the body. Step 3: The enzymes from the pancreas are sent into the small intestine, where they help break down all types of food — carbohydrates, proteins, and fats. Step 4: This is different from the liver, which produces bile specifically for breaking down fats. The pancreas works on ALL types of food. Step 5: Option A is wrong because bile is stored in the GALL BLADDER, not the pancreas. Option B describes t

Kidneys, ureters, bladder, and urethra

Step 1: The excretory system removes waste products formed inside the body. Different organs help in this — the lungs remove carbon dioxide, the skin removes sweat, and the kidneys remove urine. Step 2: However, the lungs and skin have other primary jobs (breathing and protection). Only the kidneys, ureters, bladder, and urethra exist SPECIFICALLY for excreting urine (liquid waste). Step 3: Therefore, the textbook says the MAIN organs of the excretory system are kidneys, ureters, bladder, and urethra. Step 4: Option C (stomach, large intestine, anus) belongs to the DIGESTIVE system. Step 5: Op

Kidneys → Ureters → Bladder → Urethra → Outside

Step 1: Urine is formed inside the two KIDNEYS. The kidneys filter the blood and remove toxins and excess water as urine. Step 2: From the kidneys, urine travels through thin tubes called URETERS. There are two ureters, one from each kidney. Step 3: The ureters carry urine to the URINARY BLADDER, where it is stored. The bladder can hold 400–600 mL of urine. Step 4: When the bladder is full, urine is released out of the body through the URETHRA. Step 5: All the other options have the organs in the wrong order. Remember: Kidneys → Ureters → Bladder → Urethra — you can use the phrase 'Keep Urine

It absorbs water from leftover food and forms solid waste called faeces.

Step 1: After the small intestine absorbs nutrients, the leftover food material (which the body cannot use) moves to the LARGE INTESTINE. Step 2: The large intestine has a very specific job — it absorbs the WATER from this leftover material. This water goes back into the body so it is not wasted. Step 3: After the water is removed, the remaining solid material forms FAECES (also called stool or waste). Step 4: This faeces is then pushed out of the body through the ANUS. Step 5: Breaking proteins (Option A) is done by the stomach and small intestine. Absorbing nutrients (Option B) is the job of