Structure of Ovum
Detailed examination of the morphology and components of the human egg cell, crucial for understanding fertilization.
What is Structure of Ovum?
The cytoplasm of the ovum, containing yolk granules and organelles.
Key points
- Describe the size, shape, and motility of the ovum.
- Identify and explain the function of the different layers surrounding the ovum.
- Understand the contents of the ovum's cytoplasm and nucleus.
- Recognize the ovum's role as the female gamete in reproduction.
Common exam trap
Confusing the ovum with the oocyte stages (primary vs. secondary).
Definitions
- Term
Ooplasm
- Meaning
The cytoplasm of the ovum, containing yolk granules and organelles.
- Term
Zona Pellucida
- Meaning
A thick, transparent glycoprotein layer surrounding the ovum, essential for sperm binding and preventing polyspermy.
- Term
Corona Radiata
- Meaning
The outermost layer of cells surrounding the ovum, derived from granulosa cells of the ovarian follicle.
- Term
Oolemma
- Meaning
The plasma membrane of the ovum.
Learning objectives
Describe the size, shape, and motility of the ovum.
Identify and explain the function of the different layers surrounding the ovum.
Understand the contents of the ovum's cytoplasm and nucleus.
Recognize the ovum's role as the female gamete in reproduction.
Prerequisites
Cell structure (plasma membrane, cytoplasm, nucleus).
Meiosis and its stages.
Basic understanding of gametogenesis.
Common mistakes
Confusing the ovum with the oocyte stages (primary vs. secondary).
Underestimating the importance of the protective layers for fertilization.
Assuming the ovum is motile.
Keywords
Ovum
Egg cell
Female gamete
Oogenesis
Fertilization
Zona pellucida
Corona radiata
Ooplasm
Haploid
Secondary oocyte
Practice preview
The human ovum, at the time of ovulation, is typically in which stage of meiosis?…
medium
Which of the following is the outermost layer of the human ovum?…
easy
The zona pellucida is a layer primarily composed of:…
easy