Therefore, the due date is generally calculated from the first day of the last menstrual period (LMP). In this case, 2 weeks are added to the calculation giving a total of 40 weeks (280 days). This is based on the assumption that ovulation/conception occurs on cycle day 14 in the âaverageâ 28 day menstrual cycle.
By Regina Bailey. Definition: The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction.It is commonly the most prominent organelle in the cell.The nucleus is surrounded by a structure called the nuclear envelope.This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.he nucleus is surrounded by a structure called the nuclear envelope. This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.
Noun. 1. proton-a stable particle with positive charge equal to the negative charge of an electron. hydrogen ion-a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus. nucleon-a constituent (proton or neutron) of an atomic nucleus. Translations.