The three plant tissue systems are the following:
a. Dermal tissue – outer covering that protects the plant
b. Vascular tissue – supports the body of the plant and transports water and nutrients in the plant
c. Ground tissue – responsible for photosynthesis, stores nutrients, and provides additional physical support of the plant

Roots are hair-like structures that are formed in vascular plants. They anchor the body of the plants to the soil and help absorb the water and nutrients.

Stems are the structural axes found in plants. Here are the three functions of stems:
1. They serve as the plant’s support by holding up the leaves to the sun.
2. They are the plant’s transport system that delivers the water and nutrients into the different parts of the plant.
3. They form the branches, the leaves, and the flowers.

Leaves are the broad and flat surfaces found in plants that are used in photosynthesis. It protects the plant from water loss by retaining the water and letting the exchange of gases take place.

The combined forces of active transport, root pressure, capillary action, and transpiration aid in the movement of water molecules throughout the entire plant.

a. Root pressure and active transport are the driving forces that cause the fluids and substances to move upward from the soil into the roots.

b. Capillary action is the movement of the water molecules across the surface of plant tissues caused by the adhesion between the two.

c. Transpiration is the evaporation of water from the leaves.

Due to the forces acting between the water and the plant’s transport tissues, the water molecules and nutrients flow in an upward manner. This is important because the pressure coming from the roots allows the molecules to go up instead of accumulating inside the root system. If this happens, the roots will begin to expand as they fill up with water and nutrients.

The combined forces of active transport, root pressure, capillary action, and transpiration aid in the movement of water molecules throughout the entire plant. Due to the forces acting between the water and the plant’s transport tissues, the water molecules and nutrients flow in an upward manner. This is important because the pressure coming from the roots allows the molecules to go up instead of accumulating inside the root system. If this happens, the roots will begin to expand as they fill up with water and nutrients.

The tree sapling exhibits primary growth in the apical meristems, which are responsible for the increase in its length or height. However, it does not show secondary growth, which happens in the vascular cambium. In this case, the vascular cambium does not produce enough tissues that make the stems thicker over time.

The rest of the water is lost in the atmosphere in the form of water vapor through a process called transpiration, which is the evaporation of water from the leaves. This process helps the leaves to remain cool during the dry and hot days.

The diagram below shows how materials and substances are transferred in and out of the plant, as well as between the roots, the stems, and the leaves.

The diagram below shows how materials and substances are transferred in and out of the plant, as well as between the roots, the stems, and the leaves. (Click to see the diagram)