what do you know about the functions of the parts of digestive system?
Answer (1)
ANSWER: 1. Mouth (Oral cavity): Mechanically break down food through chewing, while saliva, containing enzymes like amylase, starts the chemical breakdown of carbohydrates. The tongue manipulates food and aids in swallowing. 2. Pharynx and Esophagus: The pharynx receives food from the mouth and directs it to the esophagus. The esophagus, a muscular tube, uses peristalsis (wave-like muscle contractions) to transport food to the stomach. 3..Stomach: The stomach acts as a mixing and grinding chamber. It secretes gastric acid and enzymes (like pepsin) to break down proteins, converting food into chyme (a semi-liquid mass). The stomach also stores food and releases it gradually into the small intestine. 4. Small Intestine: This long, coiled tube is the primary site of nutrient absorption. It receives chyme from the stomach and digestive juices from the pancreas and liver. Enzymes in these juices further break down carbohydrates, proteins, and fats. The small intestine's lining absorbs the resulting nutrients into the bloodstream. 5. Large Intestine: The large intestine absorbs water and electrolytes from undigested food, forming stool. Bacteria residing in the large intestine further break down some remaining nutrients and produce vitamin K. The stool is then stored in the rectum before elimination through the anus. ACCESSORY ORGANS:- Liver: Produces bile, which aids in fat digestion.- Gallbladder: Stores and concentrates bile.- Pancreas: Secretes digestive enzymes (like amylase, lipase, and protease) into the small intestine.
