Digestive System - Breaking Down Food Into Simple Forms For Body Function

The digestive system is responsible for the breakdown and absorption of nutrients from food, while the respiratory system is for breathing, nervous system for communication and control, and circulatory system for the transportation of oxygen and nutrients.

Mechanical digestion refers to the physical breakdown of food into smaller pieces through processes like chewing. Chemical digestion involves breaking down food molecules with enzymes. Absorption is the process of nutrients passing from the digestive system into the bloodstream. Elimination is the excretion of waste products from the body.

Chemical digestion refers to the breakdown of complex substances into simpler chemicals through the action of digestive enzymes in saliva and gastric juices. This process is essential for the body to extract nutrients from food.

Peristalsis is the coordinated contraction and relaxation of muscles that helps move food through the digestive system. The other options do not specifically refer to the process described in the question.

Gastric juice is the combination of hydrochloric acid, mucus, and digestive enzymes specifically found in the stomach, where it helps with food digestion. Pancreatic juice, bile, and saliva are also involved in the digestive process but are not the correct answer for this particular combination.

The large intestine is responsible for reabsorbing water and forming feces before it is expelled from the body. The small intestine is primarily where nutrient absorption occurs, the stomach digests food, and the liver aids in detoxification and metabolism.

The liver is the largest internal organ in the human body and performs vital functions such as metabolizing toxins and producing bile. While the kidney filters blood and produces urine, the pancreas regulates blood sugar levels and the spleen acts as a filter for blood cells.

The small intestine is the part of the digestive system where most of the absorption of nutrients from food takes place, utilizing villi to increase surface area. The stomach primarily breaks down food, the large intestine absorbs water, and the esophagus is the tube that carries food from the mouth to the stomach.

The pancreas secretes digestive enzymes that help break down fats, proteins, and carbohydrates in the small intestine.