BLOGGER TEMPLATES AND TWITTER BACKGROUNDS

Thursday, October 8, 2009

Graminae (leaf)

Vegetal biology

Graminae

Graminae (leaf): plant with a cylindrical stem and inconspicuous flower spikes.
Blade (lamina): main part of the leaf.
Ligule: single petal of the Graminae.
Bud: plant formation that develops into a leaf.
Node: point where the leaf is attached to the stem.
Internode: part of a branch between two nodes.
Adventitious roots: root that sprouts from the stem.
Auricle: small appendage at the base of a Graminae leaf.

Branch with Opposite Buds

Vegetal biology

Branch with opposite buds

Branch with opposite buds: small branch.
Terminal bud: but at the end of a branch.
Ventilating area (lenticel): ventilating pore.
Lateral bud with three sets of bud scales: plant formation that develops into a leaf and is covered with three rows of small protective scales.
Woody pith (core): central core of the plant.
Bud scale scars from the preceding year: marks left by the terminal bud from the previous year.
Petiole: part of the plant connecting the leaf to the stem.
Venation: the veins of the leaf.
Blade: main part of the leaf.

Plant Cell

Vegetal biology

Plant cell

Plant cell: the cell is a highly complex system that is the site of intense energy exchange and which presents vast interphase surfaces. Like all living organisms, it feeds itself, grows, multiplies and dies.
Plasmodesma: intercellular bridge.
Dictyosome: cellular organelle that elaborates sugars and proteins.
Chromatin: a colouring substance in the nucleus of the cell.
Nucleus: small spherical body with the cell nucleus.
Nuclear envelope: membrane surrounding the nucleolus.
Endoplasmic reticulum: a formation within the cytoplasm that plays a role in the production of various substances.
Peroxisome: cytoplasmic organelle which contains enzymes.
Chloroplast: granule of chlorophyll, which is needed for photosynthesis.
Mitochondria: granule that plays an important role in the respiration and energy-releasing reactions in living cells.
Cytosol: liquid part of the cytoplasm.
Free ribosome: cytoplasmic organelle which is responsible for protein synthesis.
Tonoplast: vacuolar membrane.
Vacuole: space with the cytoplasm of a cell containing various substances.
Cell wall: cell wall.
Plasma membrane: envelope of plasma.
Thylakoids: membranous molecular structures involved in photosynthesis.
Starch grain: starch granule.

Wednesday, October 7, 2009

Branch with Alternate Buds

Vegetal biology

Branch with alternate buds

Branch with alternate buds: small branch.
Terminal bud: plant formation that develops into a leaf, and is situated at the side of the end of the branch.
Lateral bud with three sets of bud scales: plant formation that develops into a leaf and is covered with three rows of small protective scales.
Lateral bud with two sets of bud scales: plant formation that develops into a leaf and is covered with two rows of small protective scales.
Spongy pith (core): centre part of a branch.
Auxiliary bud: part of a leaf that secretes a substance.
Blade: main part of the leaf.
Central vein: line dividing the leaf in two.
Lateral vein: line dividing, but not completely, the leaf into sections.
Tip: end of the leaf.

Structure of A Plant

Vegetal biology

Plant

Structure of a plant: living being with cellulose walls, and often chlorophyll and starch; it has neither a mouth nor a nervous system; its mobility and sensitivity are weaker than those of animals.
Flower: coloured and usually scented product of a plant.
Fruit: product of a plant that follows the flower.
Seed: part of the plant essential for reproduction.
Leaf: part of the plant that is an offshoot of the stem and is usually green.
Stem: part of the plant that carries the leaves.
Root: underground structure which feeds the plant and holds it in place.
Shoot: above ground part of the plant.

Structure of A Tree

Vegetal biology

Tree

Structure of a tree: large ligneous plant whose stem is bare lose to the ground and carries branches at its top.
Branches: branches and boughs of a tree.
Top: the highest part of the tree.
Foliage (leaves): the leaves of a tree.
Branch: strong offshoot of the trunk of a tree.
Trunk: body of the tree.
Lateral roots: roots that grow outward from the tree, undeground, holding the tree in place and nourishing it.
Taproot: main root that grows vertically into the ground.
Root hair zone: small thread like parts of the root.
Radicle: small roots.
Bole: part of the tree between the ground and the first branches.
Twig: divisions of the branches.
Crown: part of the tree from the first branch to the top.