Differentiate between the following:
a) Xylem and Phloem
b) Arteries and Vein
Answers
Explanation:
xylem
1. xylem is a part of plant which transports water and mineral from roots to every part of plant
2. it is unidirectional
phloem
1. phloem is a part of plant which transports food from leaves to every part of plant
2. phloem is bidirectional
arteries
1. arteries carry oxygenated blood from heart to all body parts except pulmonary artery
2. arteries are thick walled as they had to take pure blood
veins
1. veins carry deoxygenated blood from body parts to heart except pulmonary vein
2. they are thin walled as they had to impure blood
Explanation:
Difference between xylem and phloem transport:
Xylem transport
1. Xylem tissues include tracheids, vessels, fibres and parenchyma and serve in ascent of sap/water and minerals.
2. Due to defined source and sink relationship, the movement is unidirectional.
3. Xylem transport is not influenced by metabolic inhibitors
4. Xylem vessels and tracheids are main component of transport.
5. Major driving forces are transpiration pull and diffusion.
Phloem transport
1. Phloem tissues is a composed of four elements namely, sieve tube elements, companion cell, phloem fibres and phloem parenchyma and serve in translocation of organic nutrients.
2. The movement is multidirectional as source sink relationship keeps changing.
. 3. Phloem transport is inhibited by metabolic inhibitors.
4. Sieve tube are main component of transport which are assisted by companion cells.
5. Being active transport, it uses ATP
Arteries
1.Arteries carry blood away from the heart to the tissues of the body.
2.Arteries carry oxygenated blood expect pulmonary artery.
3.Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body.
Veins
1 Veins carry blood from the tissues of the body back to the heart.
2.Veins carry deoxygenated blood except pulmonary vein.
3.Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.