Bast
Bast
Bast (/bæst/), also known as phloem, is a type of tissue found in plants. It is responsible for the transportation of nutrients throughout the plant.
Etymology
The term "bast" originates from the Old English word "bæst", which means "inner bark of a tree". The term was used to describe the fibrous material obtained from the inner bark of certain plants, which was used for making rope and other products.
Function
Bast is a complex tissue in the vascular system of plants. It is responsible for the transportation of organic nutrients, such as sugars, from the leaves to the other parts of the plant. This process is known as translocation.
Structure
The structure of bast consists of sieve tube elements and companion cells. Sieve tube elements are elongated cells that are responsible for the transportation of nutrients. Companion cells are smaller cells that assist the sieve tube elements in their function.
Related Terms
- Phloem: The scientific term for bast. It is one of the two types of transport tissue in vascular plants, the other being xylem.
- Translocation: The process by which organic nutrients are transported throughout the plant.
- Sieve tube: A series of cells in the phloem tissue of plants that are responsible for the transportation of nutrients.
- Companion cell: A type of cell found in the phloem tissue that assists the sieve tube elements in their function.
External links
- Medical encyclopedia article on Bast
- Wikipedia's article - Bast
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