One of these is an organelle containing a modified chloroplast (plastid) possessed by some single-celled eukaryotic parasites, that allows them to enter into a host cell.
1.Apical Complex
2.Pellicle
3.Cytostome
4.Contractile Vacuole

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.