there are two layers inner and outer layer of a blood cell.......
2 layers of lipids.
A hydra typically has two cell layers: an outer layer of epithelial cells and an inner layer of gastrodermal cells. These layers are separated by a jelly-like extracellular matrix called the mesoglea.
there are 2 layers. one for each side. like a sandwich and the layers are the bread. there are two of them so they can hold together the inside :]
complex
23
forty-six layers
2 layers of lipids.
71 microscopic layers
2 layers
Oxygen diffuses through two layers of cells: the alveolar epithelial cells lining the lung air sacs and the capillary endothelial cells before it reaches a red blood cell in the pulmonary capillaries.
3
there are three
Three
2
there are 2 layers. one for each side. like a sandwich and the layers are the bread. there are two of them so they can hold together the inside :]
There is only one normal type of red blood cell.
Sickle cell disease is one of many diseases of the red blood cell.