Zona Pellucida (Noun)
Meaning
Thick membrane around the mammalian ovum; can be penetrated by one sperm in the fertilization process; usually remains around the fertilized egg until it is implanted in the wall of the uterus.
Classification
Nouns denoting body parts.
Examples
- The zona pellucida is a thick glycoprotein layer surrounding the mammalian ovum that plays a crucial role in fertilization.
- During the process of fertilization, a single sperm must penetrate the zona pellucida to reach the egg.
- The zona pellucida serves as a protective barrier around the ovum and remains intact until the fertilized egg is implanted in the uterine wall.
- Fertilization typically occurs when a sperm successfully penetrates the zona pellucida and fuses with the egg.
- The zona pellucida helps to facilitate the process of fertilization by allowing only one sperm to penetrate its outer layer.