Answered

### Digestive System

1. What is the primary function of the digestive system?

A. Circulation of blood
B. Oxygen absorption
C. Food digestion
D. Urine filtration

2. Which organ is responsible for breaking down and digesting food in the digestive system?

A. Lungs
B. Liver
C. Stomach
D. Brain

3. What is the name of the first organ in the digestive system where digestion begins?

A. Esophagus
B. Stomach
C. Mouth
D. Small intestine

4. In the digestive system, where are nutrients absorbed into the bloodstream?

A. Liver
B. Stomach
C. Small intestine
D. Large intestine

### Respiratory System

5. What is the primary function of the respiratory system?

A. Filtration of blood
B. Nutrient absorption
C. Gas exchange
D. Urine production

6. Which organ in the respiratory system is responsible for gas exchange?

A. Brain
B. Heart
C. Lungs
D. Kidneys

### Circulatory System

7. What is the main purpose of the heart in the circulatory system?

A. Breathing
B. Digestion
C. Pumping blood
D. Vision



Answer :

GinnyAnswer

Final answer:

The primary function of the digestive system is food digestion. The stomach is responsible for breaking down and digesting food. The mouth is where digestion begins in the digestive system.


Explanation:

The primary function of the digestive system is food digestion, where the process of breaking down food into components the body can absorb occurs. This system also involves absorption of nutrients and elimination of solid waste. The organ responsible for breaking down and digesting food is the stomach, where food undergoes further chemical processing after ingestion. The first organ in the digestive system where digestion begins is the mouth, where both mechanical and chemical breakdown of food initiates.


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