BAB 2 : STRUKTUR DAN FUNGSI TUBUH MAKHLUK HIDUP | Part 4: SISTEM PENCERNAAN | IPA Kelas 8 Kumer

0:00 Hello Sas friends Welcome to miss Maya channel before watching this video don't forget to like comment and subscribe first enjoy this [Music] video Hello science friends meet again on Miss Maya's YouTube channel in this video we will learn about the digestive system watch the video until it's finished science friends Do you think the food that enters our body will be digested by the body Yes of course the food that enters

0:49 will be digested by our body food will be meaningless if it is not digested food must be digested so that our body can get nutrition to maintain all our body's functions there are organs that play a role in the human digestive process organs in the digestive system are grouped into three large parts based on their function namely digestion absorption and excretion science friends Did you know the digestive system from the mouth to the rectum is around 9 M long Wow it turns out it's long too

1:35 God created the human body science friends now let's learn first about the digestive process digestion is a process when the food you eat is broken down into small nutrients digestion is divided into two namely chemical digestion and mechanical digestion chemical digestion is the processing of food assisted by a chemical called an enzyme while mechanical digestion is the process of breaking down food into smaller forms Digestion Chemical digestion occurs in several parts of the

2:22 digestive system such as in the mouth, stomach, and small intestine, while mechanical digestion usually occurs in the mouth and stomach and involves physical movements, namely muscles. Next, we will discuss the absorption and disposal process. The absorption process occurs after digestion. After food is broken down in the walls of the digestive tract and becomes nutrient molecules, these nutrients will be absorbed and carried by the blood to be circulated throughout the body. The process of food absorption occurs in the small intestine, while the large intestine eliminates the remains of food that are not absorbed and then excreted. Well, how do

3:09 you understand, science friends? How is the process of food being digested by the body? It turns out that there are parts that are absorbed by the body and other parts are excreted into feces. Science friends, our digestive organs have different functions. Let's discuss them one by one. The first is the mouth organ. In the mouth, mechanical and chemical digestion occurs. Teeth and tongue play a role in the mechanical digestion process. Teeth function to cut, tear, and chew food into small pieces. Tongue functions to push food.

3:56 Chemical digestion occurs when the salivary glands or Luda in the mouth produce an enzyme called amylase. The amylase enzyme functions to break down starch, which is a complex carbohydrate, into glucose, which is a simple carbohydrate so that your body's cells are able to absorb it. The next organ is the esophagus at the back of your mouth. There are two channels, the first is the one that leads to the respiratory tract called the throat and functions to carry air to the lungs and the other channel to the digestive tract called the

4:41 esophagus. When you eat, a valve called the epiglottis will close the throat to prevent food from entering the respiratory tract. Food will enter the esophagus, which is a muscular channel that connects the mouth to the stomach. In the esophagus there is mucus that helps lubricate food. With the movement of the esophageal muscles called peristalsis, food will be pushed into the stomach. The third organ is the stomach. After food enters the stomach, mechanical and chemical digestion occurs. Mechanical digestion is

5:27 carried out by smooth muscles that line the stomach wall, while chemical digestion is assisted by digestive fluids or what we usually call enzymes. In the stomach, there are several enzymes that work, including hydrochloric acid or HCL, pepsin and rennin. This HCL functions to kill germs that enter with the food you eat. Digested food is stored for about 2 hours or more. In the stomach, when it is in the stomach, the shape of your food is in the form of thick liquid then the enzyme pepsin functions to digest protein into

6:14 amino acids while rennin functions to precipitate milk casein organ which then there is the small intestine science friends did you know that your small intestine is about 6 m long but its diameter is only about 2 to 3 cm Therefore it is called the small intestine or small intestine in this place the longest chemical digestion process occurs among other digestive organs when it reaches the small intestine food is again chemically digested the liver and pancreas send chemicals to help the digestive process the liver makes

7:01 bile which functions to break down the fat we eat into small granules after being made bile will be stored in the gallbladder and released when food reaches the small intestine then the pancreas the pancreas is located between the stomach and the initial part of the small intestine the pancreas produces digestive enzymes that digest carbohydrates protein and fat the pancreas produces several enzymes among which the first is trypsin which functions to break down protein into amino acids the second is amylase this amylase functions to

7:47 change starch into a sugar called maltose and the third is lipase which functions to change fat into fatty acids and glycerol science friends did you know you that the small intestine is the place of food absorption process after chemical digestion that occurs in the small intestine is complete nutrient molecules are ready to be absorbed by the body approximately How is the absorption process well it turns out that in the small intestine we have a structure in the form of small folds like fingers called fily Fili is useful for expanding the absorption area if we look at the structure is

8:33 similar to a towel yes the function is also the same that is to expand the absorption area phly functions to absorb food while towels absorb water in our wet bodies when finished bathing the next organ is the large intestine when food reaches the small intestine all nutrients have been absorbed all that remains is water and the remains of S food that cannot be digested such as fiber or grains water and the remains of the food are carried to the large intestine in the large intestine the process of water absorption occurs while the remains of food are ready to be excreted the length of the large intestine is about 1.5 m the large intestine

9:22 contains good bacteria that help the formation of vitamin K science friends the end of the large intestine is the rectum the rectum is where the remains of food are pressed into a solid form these food remains are then excreted from the body through the anus the remaining food is excreted in the form of feces or what we usually call feces science friends that is our discussion this time in the video Here we have learned a lot about the digestive system, starting from how the body can digest food, what organs play a role in

10:07 digestion, and the function of each digestive organ. So, science friends, do you understand the sub-sections of the digestive system? That's all for our discussion about the digestive system in humans. In the next video, we will discuss the circulatory system in humans. Keep up the good work, science friends. Thank you for watching, science friends, see you on my next video, bye [Music] bye