organelle
the cell membrane. It regulates what enters and exits the cell.
Nucleus
the lysosomes
Mitochondria is the cellular structure that is responsible for circulation. Mitochondria are surrounded by a membrane and are present in most eukaryotic cells.
The cell membrane
the cell membrane. It regulates what enters and exits the cell.
Smooth muscle surrounding the bladder pushes urine out of the urethra.
Nucleus
The mitochondria ^_^
cell membrane
the lysosomes
The Golgi bodies is the structure that is responsible for the transportation and delivery of materials in cells.
Nucleus.
Mitochondria is the cellular structure that is responsible for circulation. Mitochondria are surrounded by a membrane and are present in most eukaryotic cells.
The cell membrane
Chloroplasts
Cell membrane is responsible for that.It is the barrier of cell.