Many people like to plant some trees in front of their homes. Planting trees can play the role of "town house", and planting some trees behind the front room of the house can also facilitate shading in summer. It's very hot in summer, so it's comfortable to sit under the big tree and enjoy the cool.
Brief introduction of the factory:
Plants have six organs: roots, stems, leaves, flowers, fruits and seeds.
The stem is the axis of a plant. Erect or crawling in water, with branches on the stem and meristems at the top of the branches for the top to grow. Stems usually differentiate into short nodes and long nodes. Stem has the function of transporting nutrients and water and supporting the distribution and formation of leaves, flowers and fruits in a certain space. Some stems also have the functions of photosynthesis, nutrition storage and reproduction.
Leaves are one of the vegetative organs of vascular plants. Its function is to synthesize organic matter through photosynthesis, and it has transpiration to provide roots with the power to absorb water and mineral nutrients from the outside.
Flowers are unusually short branches with reproductive function. Fruit is mainly used as a medium for spreading seeds. Seeds have the function of reproduction and reproduction, and they also have various structures suitable for reproduction or resistance to adversity, which creates good conditions for the continuation of plant races.
It is estimated that there are about 350 thousand species of plants, which are divided into seed plants, bryophytes, ferns and algae. Up to 2004, 287,655 species have been identified, including 258,650 flowering plants, 65,438+06,000 bryophytes, 65,438+065,438+0000 ferns and 8,000 green algae.