These medical condition or symptom topics may be relevant to medical information for Orchialgia: 1  Pain (6458 causes) 2  Pain symptoms (6458 causes) 3  Pain disorder.  Pain 1  syndrome. Testis.  Testis symptoms (247 1  causes) Testis disorder.  SYN. Orchalgia.
The innermost matrix of chloroplasts, called the stroma, contains metabolic enzymes and multiple copies of the chloroplast genome. Chloroplasts also have a third internal membrane called the thylakoid membrane, which is extensively folded and appears as stacks of flattened disks in electron micrographs.
Within the plant cells (usually leaf cells), the cytoplasm contains organelles called chloroplasts where photosynthesis takes place. Each chloroplast contains stacks of struct â¦ ures called thylakoids, which contain the chlorophyll.+ 4 others found this useful. Adrienne Painter.hotosynthesis takes place in the Chloroplasts of the plant cell  because it contains chlorophyll, the proteins required for  photosynthesis, and the membranes needed to mak â¦ e a chemiosmotic  gradient to produce ATP. + 48 others found this useful.