Maternal and fetal tissues form two units that are closely bound together at the placental level. Quiz. The fetal part of the placenta is made up of the chorionic plate with its placental villi, the cytotrophoblast layer and the intervillous spaces.
1 , which performs the function of photosynthesis. 2  Chloroplasts are double-membrane-bound, like mitochondria. 3  Also like mitochondria, their inner membrane is very complicated. 4  In fact, it's formed into many thylakoid structures which perform the same function performed by the thylakoids in prokaryotic cells.
Production of energy. ATP Synthesis. The main function of mitochondria is the production of ATP. According to many textbooks: Energy production within cells is the main function of mitochondria. However, some students are told not to state that mitochondria produce or create energy.roduction of energy. ATP Synthesis. The main function of mitochondria is the production of ATP. According to many textbooks: Energy production within cells is the main function of mitochondria. However, some students are told not to state that mitochondria produce or create energy.