What is the primary function of the stomach and small intestine in the digestive system?
The primary function of the stomach and small intestine in the digestive system is to break down and absorb nutrients from food
How does the stomach break down food?
The stomach breaks down food using muscular contractions and digestive juices such as hydrochloric acid and enzymes
What is the role of hydrochloric acid in the stomach?
Hydrochloric acid helps to break down food and kill bacteria in the stomach
How long does food stay in the stomach?
Food can stay in the stomach for around 2-4 hours, depending on the type of food and individual digestive system
How does the small intestine absorb nutrients?
The small intestine absorbs nutrients through the walls of its lining using small finger-like projections called villi.
What are the three sections of the small intestine?
The three sections of the small intestine are the duodenum, jejunum, and ileum
What are villi and microvilli in the small intestine?
Villi and microvilli increase the surface area of the small intestine, allowing for more efficient absorption of nutrients
How do the pancreas and liver contribute to digestion in the small intestine?
The pancreas and the liver contribute digestive enzymes and bile to the small intestine to help break down fats, proteins, and carbohydrates
What is the role of the gallbladder in digestion?
The gallbladder stores and releases bile into the small intestine to help with fat digestion
What is the pH of the small intestine?
The pH of the small intestine is slightly alkaline, typically between 7.0 and 8.5
What is the purpose of intestinal bacteria?
Intestinal bacteria help to break down undigested food, produce vitamins, and aid in immune function
How does the body prevent food from entering the lungs?
The epiglottis blocks the trachea (windpipe) when we swallow, preventing food from entering the lungs.
What happens to undigested food in the small intestine?
Undigested food in the small intestine can cause discomfort, gas, and bloating, and may eventually be eliminated as waste.
What is an ulcer, and how is it treated?
An ulcer is a sore in the lining of the stomach or small intestine that can be caused by bacteria or excess stomach acid. Treatment may involve medication
How do lifestyle factors like diet and stress affect digestion?
Diet and stress can affect digestion by influencing the amount of stomach acid produced and the rate of movement of food through the digestive system
