\begin{tabular}{|l|l|}\hline \multicolumn{2}{|c|}{\begin{tabular}{|l|l|}\hline Distinguish between kidney stones and gallstones. \\ \hline & GALLSTONES \\ \hline & \\ \hline \\ Is carbon dioxide in your body excreted or egested? Explain why \\ you say so. \\ \hline\end{tabular}} \\ \hline \\ \hline\end{tabular}

**1. Distinguishing Kidney Stones and Gallstones** - **Kidney Stones:** - Formed in the kidneys. - Usually consist of minerals such as calcium oxalate, calcium phosphate, uric acid, or struvite. - They develop when there is an imbalance in the concentration of dissolved substances in the urine, leading to crystallization. - Often cause severe pain, particularly during passage through the urinary tract. - May lead to complications like urinary tract infections or kidney damage if left untreated. - **Gallstones:** - Formed in the gallbladder. - Typically composed of cholesterol or bilirubin (pigment stones). - Develop when bile contains too much cholesterol or bilirubin, resulting in the formation of stones. - Can block bile ducts, causing pain in the right upper quadrant of the abdomen and other complications such as cholecystitis or pancreatitis. - They are associated with factors such as obesity, rapid weight loss, or genetic factors. --- **2. Is Carbon Dioxide in Your Body Excreted or Egested?** - **Excretion vs. Egestion:** - **Excretion** is the process of removing metabolic waste products from the body. - **Egestion** refers to the elimination of indigestible material from the digestive tract. - **Carbon Dioxide:** - Carbon dioxide (\( \text{CO}_2 \)) is produced as a waste product during cellular respiration. - Cells generate energy by converting nutrients into energy, producing \( \text{CO}_2 \) as a byproduct. - \( \text{CO}_2 \) is transported in the blood to the lungs where it is expelled during exhalation. - Therefore, \( \text{CO}_2 \) is excreted (not egested) because it is a metabolic waste eliminated by the respiratory system. Thus, carbon dioxide is excreted because it is a byproduct of cellular metabolism that is removed from the body via the lungs.