8.3 Absorption & Elimination

The statement is false because the duodenum is actually the beginning of the small intestine, not the end. It is the first part of the small intestine that receives partially digested food from the stomach and continues the process of digestion.

The villi in the small intestine are responsible for absorbing nutrients from food. If Willie is missing many of these villi, it means that his ability to absorb nutrients will be compromised. As a result, he will absorb less nutrients from his food, leading to potential nutrient deficiencies and related health issues.

The correct answer is transverse colon. The image shows a section of the large intestine that is horizontally positioned across the abdomen. This is characteristic of the transverse colon, which connects the ascending colon to the descending colon. The ascending colon is located on the right side of the abdomen, the descending colon is on the left side, and the rectum is the terminal part of the large intestine, located just before the anus. Therefore, the transverse colon is the most appropriate answer based on the given information.

The correct answer is duodenum. The image shows a section of the small intestine, and based on its location, the duodenum is the first part of the small intestine that connects to the stomach. The jejunum and ileum are also parts of the small intestine, but they are located further down from the duodenum. The anus is the opening at the end of the digestive tract and is not part of the small intestine.

The small intestine is responsible for the absorption of nutrients from food, as well as the digestion of carbohydrates, proteins, and fats. However, elimination, which refers to the process of removing waste products from the body, does not occur in the small intestine. Elimination primarily takes place in the large intestine, where waste materials are formed into feces and then expelled from the body through the rectum and anus.

Villi are small projections in the small intestine that increase its surface area for absorption. This increased surface area allows for more efficient absorption of nutrients into the bloodstream. Villi have a finger-like structure and are covered in microvilli, which further increase the surface area. The absorption of nutrients such as carbohydrates, proteins, and fats occurs through the villi. Therefore, villi play a crucial role in the digestive process by maximizing the absorption capacity of the small intestine.

The purpose of this structure is to absorb nutrients.

The statement suggests that too much water being absorbed in the large intestine can cause a problem. However, this is incorrect. In reality, the large intestine's main function is to absorb water from the remaining indigestible food matter and convert it into solid waste. If too much water is absorbed, it can lead to constipation or hard stools, but not a specific problem as mentioned in the statement. Therefore, the correct answer is false.

Constipation occurs when there is too much water absorbed in the large intestine. The large intestine is responsible for absorbing water from the remaining waste material before it is eliminated from the body. If too much water is absorbed, the stool becomes hard and dry, making it difficult to pass. This can be caused by various factors such as a lack of dietary fiber, dehydration, or certain medications. Increasing water intake, consuming fiber-rich foods, and maintaining a healthy lifestyle can help prevent constipation by regulating the amount of water absorbed in the large intestine.

The jejunum is the correct answer because it is the part of the small intestine where most of the absorption takes place. It is responsible for absorbing nutrients, such as carbohydrates, proteins, and fats, into the bloodstream. The jejunum has a large surface area due to its numerous folds and finger-like projections called villi, which increase the absorption capacity.