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Both human and lizards have a digestive system which ... • The digestive system helps '.....

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GPT-4o mini
Both humans and lizards have a digestive system which serves to break down food, absorb nutrients, and eliminate waste.

The digestive system helps in several key processes:

1. **Ingestion**: The system allows for the intake of food, where it begins the digestive process.

2. **Digestion**: The mechanical and chemical breakdown of food into smaller, absorbable components. In humans, this occurs in the mouth and continues in the stomach and small intestine. In lizards, the process is similar but can vary in efficiency based on their diet and digestive adaptations.

3. **Absorption**: Nutrients are absorbed primarily in the small intestine. In humans, this process involves the walls of the intestine which are lined with villi to increase surface area. Lizards also have specialized structures in their intestines to maximize nutrient uptake.

4. **Metabolism**: Once the nutrients are absorbed, they are transported through the bloodstream to cells throughout the body where they are used for energy, growth, and repair.

5. **Excretion**: Finally, the digestive system helps to eliminate waste products that are not absorbed, which are expelled through the rectum in both humans and lizards.

Overall, the digestive system is essential for providing the energy and nutrients necessary for survival, growth, and maintenance of health in both humans and lizards.

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