parenchyma

/pə'reɳkimə/

Thân thiện

A student examines parenchyma cells under a microscope in a biology lab.

Definition

1. Noun:
   • In Botany: The fundamental, functional tissue of higher plants, composed of living, thin-walled cells that retain the ability to divide even when mature. It makes up the bulk of soft plant parts such as the interior of leaves, roots, the pulp of fruits, and the pith of stems.
   • In Anatomy & Zoology: The essential, functional tissue of an animal organ, as distinct from its supportive framework (connective tissue, blood vessels, etc.).

Usage Examples

• Noun:
  • The parenchyma of the leaf is where most photosynthesis occurs.
  • In the liver, the hepatocytes form the parenchyma, while the fibrous capsule provides structural support.
  • The soft, edible part of an apple is primarily composed of parenchyma cells.

Advanced Usage

• "Parenchymal" (Adjective): Relating to or consisting of parenchyma.
  • The scan showed a parenchymal abnormality in the lung tissue.

Variants and Related Words

• Parenchymal (adj): Of or pertaining to parenchyma.
• Parenchymatous (adj): Another adjective form meaning consisting of or resembling parenchyma.

Synonyms

• For Botanical Context: Ground tissue, fundamental tissue.
• For Anatomical Context: Functional tissue, epithelial tissue (in specific organs).

Notes on Different Meanings

The core meaning of parenchyma is the essential, functional tissue of a biological structure. The distinction lies in the kingdom of life: 1. Botanical Meaning: Refers to the basic, versatile plant tissue involved in photosynthesis, storage, and secretion. 2. Anatomical/Zoological Meaning: Refers to the tissue that performs the specific function of an organ (e.g., nephrons in the kidney, alveoli in the lung), as opposed to its "stroma" or supportive tissue.

Học thuật

Noun

1. the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems
2. animal tissue that constitutes the essential part of an organ as contrasted with e.g. connective tissue and blood vessels