Zase Biology Textbook Grade 10-12 |verified|

In-depth coverage of nutrition (both plant and animal), respiration, excretion, and homeostasis.

After you swallow, the bolus (ball of food) moves down this tube. Peristalsis – wave-like muscle contractions – pushes the food toward the stomach. This happens even if you are standing on your head! zase biology textbook grade 10-12

By the end of this section, you should be able to: In-depth coverage of nutrition (both plant and animal),