Vascular plant

Vascular plants, also called tracheophytes, are plants that have special tissues for moving water, minerals, and food throughout their bodies. These plants have lignified tissues called xylem, which carry water and minerals from the roots to other parts of the plant. They also have another tissue called phloem, which moves the products of photosynthesis, like sugars, from the leaves to other parts of the plant.

These plants include many familiar groups such as clubmosses, horsetails, ferns, gymnosperms (including conifers), and angiosperms, which are flowering plants. Vascular plants make up most land plants, with around 300,000 known species, and they are different from nonvascular plants like mosses and green algae, which lack these specialized tissues.

In the past, vascular plants were sometimes called "higher plants" because people thought they were more evolved due to their complex structures. But this idea came from an old belief called the scala naturae, and scientists no longer use that term. Today, we understand that all plants have their own unique ways of growing and living.

Characteristics

Vascular plants have special tissues that help move water, minerals, and food throughout the plant. These tissues are called xylem and phloem. The xylem carries water and minerals from the roots to other parts of the plant, while the phloem carries food made during photosynthesis from the leaves to the rest of the plant. These tissues allowed vascular plants to grow larger than non-vascular plants, which do not have these special tissues.

Most vascular plants have true roots, leaves, and stems. Their main life stage is the sporophyte, which produces tiny particles called spores. This differs from non-vascular plants, whose main life stage produces cells called gametes. These features help vascular plants grow in many different places on Earth.

Phylogeny

Scientists have studied how different types of vascular plants are related to each other. One way they show these relationships is through a diagram called a phylogeny. This helps us understand which plants share common ancestors.

Some researchers think that certain groups of plants, like ferns, may not all come from one common ancestor. Different studies can sometimes lead to different ideas about these relationships.

Nutrient distribution

Water and nutrients are drawn up from the soil by the roots and moved through the plant by special tissues. The xylem carries water and minerals, while the phloem moves sugars made by leaves during photosynthesis.

The xylem is made of dead, hollow cells that form tubes to carry water. The phloem has living cells that transport sugars and other organic compounds. These two tissues work together to help the plant grow and stay healthy by moving water, nutrients, and food throughout its body.