placentation

Thân thiện

The diagram shows the placentation of a flowering plant.

Definition

Noun: 1. The arrangement of ovules within the placenta and of placentas within the ovary of a flowering plant. This is a botanical term describing the structure and positioning of seed-bearing parts. 2. The formation and attachment of the placenta in the uterus of a mammal during pregnancy. This is a biological term describing a key developmental process.

Usage and Examples

• Botany: "The study of placentation helps botanists classify different plant families."
• Biology/Zoology: "The placentation in humans is of the hemochorial type, allowing for direct contact between maternal blood and fetal tissues."

Advanced Usage

• Types of Placentation (Botany): Specific terms describe different arrangements, such as (ovules attached to a central column) or (ovules attached to the ovary wall).
• Types of Placentation (Biology): Described by the intimacy of contact between maternal and fetal tissues, e.g., , , .

Variants and Related Words

• Placenta (n): The primary organ involved in both definitions.
• Placental (adj): Relating to or having a placenta.

Synonyms

• Botany: Ovule arrangement.
• Biology: Placental formation, implantation (in a broader embryonic context).

Học thuật

Noun

1. arrangement of the ovules in the placenta and of the placentas in the ovary
2. the formation of the placenta in the uterus