Second Quarter Examinations in Science 5

Which part of the digestive system is responsible for starting the breakdown of food?

• Esophagus

• Stomach

• Mouth

• Large Intestine

What happens to the food after it reaches the stomach?

• It is absorbed into the blood.

• It is mixed and digested by stomach juices.

• It is pushed directly to the small intestine.

• It is stored for a long time without change.

Which organ absorbs most of the nutrients from digested food?

• Small intestine

• Stomach

• Large intestine

• Esophagus

Which part of the digestive system removes excess water from undigested food?

• Esophagus

• Large intestine

• Liver

• Pancreas

Which organ helps us get oxygen from the air?

• Heart

• Lungs

• Kidney

• Liver

What is the main tube through which air passes before reaching the lungs?

• Trachea

• Diaphragm

• Esophagus

• Bronchi

What happens to the diaphragm when we inhale?

• It moves upward.

• It moves downward to let air in.

• It stops moving.

• It contracts and blocks air.

Which gas do we breathe out?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

What is the function of the reproductive system?

• To produce offspring

• To digest food

• To excrete waste

• To breathe air

When does fertilization occur?

• When the egg cell unites with the sperm cell.

• When the egg cell leaves the ovary.

• When the sperm cell reaches the uterus.

• When the embryo starts developing.