Question

explain parts of a leaf ??
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Answer 1

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Each leaf typically has a leaf blade ( lamina ), stipules, a midrib, and a margin. Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves.

Answer 2

typical leaf shows three main parts:

• 1) petiole,

• 2) leaf base, and

• 3) leaf blade or lamina,

Petiole

It is the stalk that connects a leaf to the stem of the plant, it is made of complex conducting tissues called vascular tissues.

Functions:-

• Providing support to the leaf and keeps it erect

• Transporting water and nutrients absorbed by the roots to the leaves

• Transporting photosynthetic products from the leaves to the rest of the plant

Leaf Base

It is the lowermost part of a leaf, which is closest to the petiole.

Functions

• Helping in the attachment of the leaf to the stem.

• It protects the young axillary bud

leaf blade or lamina

It is the thin, flat part of the leaf that is typically green in color. It is further divided into three parts: i) leaf apex – the tip of the leaf blade, ii) leaf margin – the edge of the leaf and, iii) leaf veins – the small channels or capillaries, which are further subdivided into venules.

Functions

• Helping plants to prepare their food using raw materials like water, carbon dioxide, and minerals through photosynthesis

• Performing evaporation from the aerial parts of a plant by a process known as transpiration