Plant Structure
Roots, stems, leaves and flowers perform specific jobs.
About this topic
Flowering plants have roots, stems, leaves and flowers. Roots anchor the plant and absorb water and minerals through root hairs; stems support the plant and transport substances in xylem (water upward) and phloem (sugars both ways); leaves are the sites of photosynthesis; flowers reproduce.
Plant tissues include dermal (protection), ground (storage, photosynthesis) and vascular. Meristems at the tips allow continuous growth. Monocots and dicots differ in seed leaves, leaf veins and flower parts.
Take a carrot: its tap root stores sugar, and a cross-section of a stem shows xylem and phloem in vascular bundles. Xylem is made of dead cells with lignin and no end walls, forming hollow tubes; phloem cells are alive, with sieve plates, and carry sugars up and down. Leaves are the main site of photosynthesis, flowers are for reproduction.
Meristems at the tips of roots and shoots are regions of cell division, allowing plants to keep growing throughout life. Different plant organs are modified for storage, climbing or protection. A common mistake is saying xylem carries food; xylem carries water and minerals up, while phloem transports sugars (translocation). Students also forget that root hairs are single cells that increase absorption area.
Key ideas
- Roots absorb
- Stems transport
- Leaves photosynthesise
Quick check
Use cases: where Plant Structure helps
- Homework: review the key idea behind Plant Structure before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Plant Structure without notes.
- Visual learning: play with the interactive lab to see how Plant Structure changes when you adjust its inputs.
- Teaching a friend: explain Plant Structure in your own words, then compare your version with the key ideas.
Biology underpins medicine, farming, conservation and biotechnology.
Frequently asked questions
What is Plant Structure?
Roots, stems, leaves and flowers perform specific jobs.
What will I learn in Plant Structure?
Roots absorb. Stems transport. Leaves photosynthesise.
Is Plant Structure part of Biology?
Yes. It is one of 150 Biology topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Plant Structure lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Plant Structure?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.