Assessing the perineum for bulging is a nursing priority to a client at the second labor stage. A bulging perineum is caused by the presence of the fetal head against the perineal area and usually signifies imminent birth. Pain medication is not administered this close to the birth instead it crosses the placenta barrier and can cause respiratory distress in the newborn. During this second stage of labor the client is encouraged to push, not pant, with each contraction.
The RNA (ribonucleic acid) and the associated proteins forms the ribosomes. These ribosomes are the site of protein synthesis in a cell. Inside the stained cell nucleus, the nucleolus part of the cell can be seen. The nucleolus is the part where the all the ribosomes of the cell are assembled.
Hence, the answer is 'nucleolus'.