Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Question
Transcribed Image Text:**Why is mitosis important within the cell cycle?**
Mitosis is a crucial process in the cell cycle, playing a key role in several vital biological functions. When a cell undergoes mitosis, it replicates its chromosomes and divides them evenly into two new cells. This ensures that each daughter cell receives a complete set of genetic information, which is essential for the following reasons:
1. **Growth**: As organisms grow, they need to increase their cell number. Mitosis allows for this expansion in a controlled and organized manner.
2. **Repair**: When tissues are damaged, they need to be repaired by replacing dead or damaged cells. Mitosis regenerates the necessary cells to keep the tissue healthy.
3. **Reproduction**: In unicellular organisms, mitosis is a method of asexual reproduction, leading to the production of genetically identical offspring.
4. **Genetic Consistency**: Mitosis maintains the same number of chromosomes in daughter cells as the parent cell, preserving genetic consistency across generations of cells.
Understanding mitosis is thus fundamental in comprehending how organisms grow, repair, and reproduce at a cellular level.
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