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.
The prophase is the longest stage of mitosis. During the anaphase, longitudinal splitting of the chromosomes occurs. The interphase and mitosis together constitute the cell cycle. During the telophase, the nuclear membrane appears around the two groups of chromosomes.