Hello,The project is completed and I am submitting it now.Tamanna Jahan, MS
Biology Lab Project:
Earthworms breathe through their skin. They do not have lungs like humans. Oxygen passes through
their skin and carbon dioxide passes out. Now through their outer skin oxygen does not pass directly but
instead it first mixes with the moist part of its skin. This mixture then passes through the skin by
diffusion. That is why the skin has to be moist if this is to happen. They can stay moist when body fluids
and mucous are released on the skin. The mucous from the skin takes the oxygen in the body. Every
time they breathe oxygen goes into the segmented part while carbon dioxide is released from the body.
Frogs can breathe in many different ways because of their unusual life cycle and aquatic and terrestrial
environments. First, they can breathe with their mouth closed. Their breathing is mostly controlled by
their throat. Through the nostrils the throat pulls the air to the lungs and through body contractions
they exhale air. This type of respiration can happen when they are not in the water. Second, they can
breathe through their outer skin layers. This ca...