These are the brain, heart, kidneys, liver, and lungs. The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.
For the beetle genus, see Coprini. Synapsis (also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. Synapsis takes place during prophase I of meiosis.
When the nuclear envelope degrades during mitosis, both the protein scaffold and the double membranes need to be broken into small pieces. Prophase Mitosis, or cell division, has four general phases: prophase, metaphase, anaphase and telophase. The nuclear envelope breaks apart during prophase. Prophase is the time during which the DNA in the nucleus condenses, meaning it gets packaged by many proteins into thick, finger-like structures.