Test: Human Body-The Digestive and Excretory Systems - Class 4 MCQ

Saliva plays a vital role in the digestive process by softening food and making it easier to swallow. It contains enzymes that begin the breakdown of carbohydrates, initiating digestion in the mouth.

The pancreas produces digestive enzymes that are critical for breaking down food in the small intestine. These enzymes help digest carbohydrates, proteins, and fats, contributing to nutrient absorption.

Regular exercise promotes overall health and helps the body remove waste through sweat. This process contributes to the excretory system's function by expelling excess salts and water.

The kidneys filter waste from the blood and produce urine as the main waste product. This urine is then transported to the bladder for storage before excretion.

Undigested food is collected in the large intestine, where excess water is absorbed and waste is formed into faeces for eventual elimination from the body.

Changes in bowel movements, such as increased frequency or looser stools, can lead to digestive problems like diarrhea. Maintaining a healthy digestive routine is essential for preventing such issues.

The small intestine is where digestion is completed, and nutrients from food are absorbed into the bloodstream. This absorption is vital for providing the body with the necessary nutrients for various functions.

After the mouth, food passes through the oesophagus, which is a tube that carries food and liquids to the stomach. This process is part of the swallowing mechanism.

The rectum acts as a temporary storage site for faeces before it is expelled from the body. This function is important for controlling bowel movements.

Chyme is the thick paste of food that is produced in the stomach after food is mixed with digestive juices. It is an essential intermediate step in the digestive process before the food moves to the small intestine.

The liver produces digestive juices that aid in the digestion and absorption of nutrients. It plays a crucial role in the digestive process by breaking down fats and detoxifying harmful substances.

Eating meals at regular times is important for maintaining a healthy digestive system and preventing digestive issues. Regular eating patterns help regulate bowel movements and improve overall digestion.

Insufficient water intake can lead to constipation and other digestive issues. Water is crucial for the formation of faeces and helps the body efficiently remove waste.

Improper chewing can lead to slower digestion and reduced nutrient absorption as it forces the digestive organs to work harder. Chewing food well helps ensure that it is adequately broken down for effective digestion.

Fiber is essential for digestive health as it helps form faeces and promotes regular bowel movements. A diet rich in fiber can prevent constipation and support overall digestive function.

The gall bladder stores bile produced by the liver until it is needed in the small intestine for the digestion of fats. This storage allows for efficient digestion when fatty foods are consumed.

Properly chewing food breaks it down into smaller pieces, making it easier for the intestines to absorb nutrients effectively. This process is crucial for efficient digestion and nutrient uptake.

The urinary bladder serves as a storage organ for urine until it is ready to be expelled from the body. It plays a key role in the excretory system by allowing the body to control the timing of urine release.

The digestive system is responsible for breaking down food into simpler forms that the body can absorb. This process allows the body to utilize the nutrients for energy and growth, which is essential for maintaining overall health.

The kidneys are the main organs of the excretory system that filter waste, salts, and extra water from the blood, producing urine. This filtration process is essential for maintaining the body's fluid and electrolyte balance.