placenta
By the chromosomes
carrier proteins
By the chromosomes
By the chromosomes
By the chromosomes
Glucose and oxygen.
When large materials are being transported through the membrane
Fatty acids and glycerol transported materials pass through epithelial cells. This is studied in science.
Some materials cross the cell membrane by diffusion. Some cross through channels. Some bind to receptors and are actively transported.
It makes and packages things to be transported out of the cell.
The material is transported using Xylem and Phloem tissues.
Volcanic activity.