ANIMAL CELLS & HUMAN CELLS
When we breathe in oxygen it is transported in the blood to all cells in the body. The same goes for nourishment
from food we eat.
Inside the cell, the oxygen is transformed into energy and carbon
dioxide, which we breathe out. So basically cells do breathe, they breathe what we breathe in.
Every cell contains many tiny energy power plants (the mitochondria).
The enzymes that control cell breathing are located in membranes
that surround the mitochondria.
One of these enzymes (cytochromoxidase) is a pump that gives out
positive and negative charges to opposite sides of the membrane, functioning roughly like a battery charger that helps to
charge our inner batteries.
These batteries power all body's functions, like our muscles,
brain, and digestion. We are helped when our cells breathe.
PLANT CELLS
They make some oxygen with photosynthesis. They also absorb
dissolved oxygen from the water. They can absorb oxygen by diffusion through
the cell membrane because they are single celled. No special organs(lungs) are
required.
Transpiration takes place in plants. It is a movement of water from the roots
to the leaves.
this show how the air gets to our muscles