Functions of the Digestive System

The video tutorial explains the digestive process starting from the oral cavity, where food is ingested and partially digested into a bolus. It then moves to the pharynx, which serves as a passageway for both the digestive and respiratory systems. The importance of the epiglottis in preventing choking during swallowing is highlighted. The esophagus is introduced as a muscular tube that uses peristalsis to move the bolus to the stomach. The cardiac sphincter is discussed in relation to its role in preventing acid reflux and heartburn.

What is the primary function of the oral cavity in the digestive process?

• To filter out toxins

• To transport food to the stomach

• To absorb nutrients

• To form a bolus through mechanical and chemical digestion

What role does the pharynx play in the digestive and respiratory systems?

• It stores food temporarily

• It is the primary site for nutrient absorption

• It serves as a hallway connecting both systems

• It acts as a filter for toxins

What is the function of the epiglottis during swallowing?

• To break down food particles

• To open the trachea

• To absorb water from food

• To cover the glottis and prevent food from entering the respiratory system

What happens if the epiglottis fails to cover the glottis during swallowing?

• Nutrient absorption is increased

• The digestive process is halted

• Choking occurs as food enters the respiratory system

• Food is digested faster

What is the consequence of food entering the respiratory system instead of the digestive system?

• Improved digestion

• Choking and potential suffocation

• Increased nutrient absorption

• Faster metabolism

What is the primary function of the esophagus in the digestive system?

• To produce digestive enzymes

• To transport the bolus from the pharynx to the stomach

• To store food temporarily

• To absorb nutrients

What type of muscle is primarily found in the esophagus?

• Cardiac muscle

• Smooth involuntary muscle

• Voluntary muscle

• Skeletal muscle

What is the function of the cardiac sphincter?

• To open the trachea

• To regulate the passage of the bolus into the stomach

• To absorb nutrients

• To produce digestive enzymes

What condition is associated with the malfunctioning of the cardiac sphincter?

• Diabetes

• Heartburn and acid reflux

• Hypertension

• Asthma

What is peristalsis?

• The absorption of nutrients

• The rhythmic contraction and relaxation of muscles to move the bolus

• The storage of food

• The production of digestive enzymes