Pith and parenchyma are both plant tissues, but they differ in their location, function, and characteristics.
| Feature | Pith | Parenchyma |
|---|---|---|
| Definition | A type of tissue found in the stem of vascular plants. | A fundamental tissue type found throughout the plant body. |
| Location | Central core of the stem. Also called the medulla. | Located in various parts of the plant including the cortex, leaves, and fruits. Parenchyma cells are also found in the pleura. |
| Function | Primarily storage of food and water. May also provide structural support. | Diverse functions including photosynthesis, storage, secretion, and wound healing. |
| Characteristics | Often composed of parenchyma cells, but can also contain other cell types. | Characterized by thin cell walls and large vacuoles. Soft and spongy, retaining starches in some circumstances. |
In Summary:
- Pith is a specific tissue type (also called the medulla) located in the center of the stem of vascular plants, often used for storage.
- Parenchyma is a more general tissue type that can be found in many parts of the plant and has diverse functions. The reference states, "Parenchyma cells in the pleura are soft and spongy, retaining starches in some circumstances."
