Organization of plants
Cells
There are 3 forms of green algae:
1. unicellular- very common in fresh water
2. colonial- live in long filaments or as colonial spheres
3. multicellular- mostly marine, ancestors of the land plants which contain cellulose in their cell walls. Plants are thought to stem from multicellular green algae.
Cells
There are 3 forms of green algae:
1. unicellular- very common in fresh water
2. colonial- live in long filaments or as colonial spheres
3. multicellular- mostly marine, ancestors of the land plants which contain cellulose in their cell walls. Plants are thought to stem from multicellular green algae.
Tissues
The first vascular tissue was found in pteridophytes. This tissue, composed of the xylem and phloem, provide structural support and allow a better flow of water and nutrients throughout the plant. These advantages allow pteridophytes, gymnosperms, and angiosperms to become larger.
A) xylem- conducts water from roots to shoots (H20 goes up)
B) phloem- conducts the products of photosynthesis from shoots to roots. (sugars go down)
The xylem and phloem are known as the "transport tubes" of the plants.
There is also a great variety of tissue within angiosperms compared to the more simple bryophytes. This tissue complexity is evident in things like leaves, flowers, roots, and more.
The first vascular tissue was found in pteridophytes. This tissue, composed of the xylem and phloem, provide structural support and allow a better flow of water and nutrients throughout the plant. These advantages allow pteridophytes, gymnosperms, and angiosperms to become larger.
A) xylem- conducts water from roots to shoots (H20 goes up)
B) phloem- conducts the products of photosynthesis from shoots to roots. (sugars go down)
The xylem and phloem are known as the "transport tubes" of the plants.
There is also a great variety of tissue within angiosperms compared to the more simple bryophytes. This tissue complexity is evident in things like leaves, flowers, roots, and more.
Organs
In angiosperms, there are many organs that ultimately create an organ system.
The reproductive organ system consists of things like the:
1. anther, and filaments, making up the male stamen
2. the ovary, ovum, style and stigma; the female carpel
The structural organ system consists of things like the:
1. xylem
2. phloem
The photosynthesis organ system consists of things like:
1. stomata
2. guard cells (chlorophyll and chloroplasts)
3. veins
In angiosperms, there are many organs that ultimately create an organ system.
The reproductive organ system consists of things like the:
1. anther, and filaments, making up the male stamen
2. the ovary, ovum, style and stigma; the female carpel
The structural organ system consists of things like the:
1. xylem
2. phloem
The photosynthesis organ system consists of things like:
1. stomata
2. guard cells (chlorophyll and chloroplasts)
3. veins
Organ systems
In the angiosperms, there are four primary organ systems which consist of
1. Leaves- The leaves are responsible for photosynthesis. This system consists of the Stomata organ opening and closing to take in C02 and release H20, all while absorbing and releasing water.
2. Stems- The stems are responsible for the conduction of materials up and down the plants (including the organs, xylem and phloem). The stems also move leaves so they face the sun and assist the plant in it's growth.
3. Roots- Roots function to absorb water and minerals from the soil and help anchor the plant as well as allow it to grow taller.
4. Flowers (which include seeds and fruit)- The flower's function is to attract a pollinator. This intricate system includes
-sepals
-petals
-stamens (male reproductive system)
-carpels (female reproductive system)
Using this system, angiosperms produce fruit encapsulated seeds that are perfectly engineered to multiply the plant in various locations.
In the angiosperms, there are four primary organ systems which consist of
1. Leaves- The leaves are responsible for photosynthesis. This system consists of the Stomata organ opening and closing to take in C02 and release H20, all while absorbing and releasing water.
2. Stems- The stems are responsible for the conduction of materials up and down the plants (including the organs, xylem and phloem). The stems also move leaves so they face the sun and assist the plant in it's growth.
3. Roots- Roots function to absorb water and minerals from the soil and help anchor the plant as well as allow it to grow taller.
4. Flowers (which include seeds and fruit)- The flower's function is to attract a pollinator. This intricate system includes
-sepals
-petals
-stamens (male reproductive system)
-carpels (female reproductive system)
Using this system, angiosperms produce fruit encapsulated seeds that are perfectly engineered to multiply the plant in various locations.