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.
During prophase the chromosomes condense as pairs of sister chromatids, the nuclear membrane disappears, and the mitotic spindle forms. During prometaphase, the kinetochores f â¦ orm on the centromeres of the pairs of sister chromatids, and the microtubules attach to the kinetochores and move the chromosomes to the center of the cell.