excrement

"The teacher is requiring students to submit their essays by Friday. "

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The scientist carefully examined the strange matter in the lab. "

"My math teacher recommended a specific textbook for extra practice. "

"The doctor ordered an X-ray to examine the patient's bowels. "

"He felt relieved after he discharged his duty of watering the plants. "

"My teacher explained the new math formula specifically for students in the advanced class. "

"The kidneys filtered the blood and excreted waste as urine. "

"My daughter walked along the sidewalk to school this morning. "

"My son is taking biology classes at school, learning about different types of plants and animals. "

"The feeling is difficult to describe, but not unpleasant."

"A cat is an animal, not a plant. Humans are also animals, under the scientific definition, as we are not plants."