Which three body systems are involved in the elimination of fecal wastes through the anus?

Which three body systems are involved in the elimination of fecal wastes through the anus?

• A. Digestive, Muscular, and Nervous
• B. Circulatory, Lymphatic, and Endocrine
• C. Integumentary, Skeletal, and Immune
• D. Nervous, Muscular, and Reproductive

Answer: (A)

The digestive, muscular, and nervous systems work together to facilitate the elimination of fecal wastes through the anus. The digestive system is primarily responsible for processing food, absorbing nutrients, and producing waste. It breaks down food in the gastrointestinal tract, allowing the body to extract necessary nutrients while preparing the remainder as fecal matter for elimination. The muscular system plays a critical role during the elimination process. The smooth muscles of the intestines (peristalsis) move the waste through the large intestine towards the rectum. Additionally, the muscles situated in the anal sphincter must relax and contract appropriately to control the expulsion of fecal matter from the body. The nervous system is essential in coordinating these actions. It sends signals that regulate the movement of the digestive tract and the contraction of muscles involved in the elimination process. Nerve impulses help the body determine when it is appropriate to defecate, enabling the person to respond to the body's needs. In contrast, the other combinations of body systems listed do not directly contribute to this elimination process. For example, the circulatory, lymphatic, and endocrine systems have roles related to fluid and waste transport, immune responses, and hormone regulation, but they do not directly manage the physical elimination of fecal

The digestive, muscular, and nervous systems work together to facilitate the elimination of fecal wastes through the anus. The digestive system is primarily responsible for processing food, absorbing nutrients, and producing waste. It breaks down food in the gastrointestinal tract, allowing the body to extract necessary nutrients while preparing the remainder as fecal matter for elimination.

The muscular system plays a critical role during the elimination process. The smooth muscles of the intestines (peristalsis) move the waste through the large intestine towards the rectum. Additionally, the muscles situated in the anal sphincter must relax and contract appropriately to control the expulsion of fecal matter from the body.

The nervous system is essential in coordinating these actions. It sends signals that regulate the movement of the digestive tract and the contraction of muscles involved in the elimination process. Nerve impulses help the body determine when it is appropriate to defecate, enabling the person to respond to the body's needs.

In contrast, the other combinations of body systems listed do not directly contribute to this elimination process. For example, the circulatory, lymphatic, and endocrine systems have roles related to fluid and waste transport, immune responses, and hormone regulation, but they do not directly manage the physical elimination of fecal