True or False

1) The length of the small intestine is 1.5 m. - True
2) Saliva is secreted by the mouth. - True

Explanation

1) The small intestine is a part of the digestive system, which is responsible for the absorption of nutrients from food. The length of the small intestine in an adult human is around 6 meters, but the effective length for absorption is about 1.5 meters. The small intestine is divided into three parts - duodenum, jejunum, and ileum. The duodenum is the first part and is responsible for the breakdown of food using enzymes secreted by the pancreas, liver, and gallbladder. The jejunum and ileum are responsible for the absorption of nutrients into the bloodstream.

2) Saliva is a clear liquid that is produced by the salivary glands in the mouth. Saliva contains enzymes that begin the process of breaking down food, making it easier to swallow and digest. Saliva also contains antibodies that help to fight off harmful bacteria in the mouth, preventing infections and maintaining good oral health. Additionally, saliva helps to keep the mouth moist, preventing dry mouth, which can cause bad breath and other oral health problems.

The length of the small intestine is about 7.5 meters long, It is the large intestine which is 1.5 meters,so it is false.
Saliva is secreted from the glands present in our mouth that made an important role in digestion.