1.What are the components of the transport system in human beings?
What are the functions of these components?
2.Why is it necessary to separate oxygenated and deoxygenated blood in
mammals and birds?
3.What are the components of the transport system in highly organised
plants?
4.How are water and minerals transported in plants?
5.How is food transported in plants?
Answers
Answer:
heya ....
Explanation:
1)Answer : The main components of the transport system in human beings are the heart, blood,
and blood vessels.
Heart pumps oxygenated blood throughout the body. It receives deoxygenated blood from the
various body parts and sends this impure blood to the lungs for oxygenation.
Being a fluid connective tissue, blood helps in the transport of oxygen, nutrients, CO2, and
nitrogenous wastes.
The blood vessels (arteries, veins, and capillaries) carry blood either away from the heart to
various organs or from various organs back to the heart.
2)Answer : Warm-blooded animals such as birds and mammals maintain a constant body
temperature by cooling themselves when they are in a hotter environment and by warming
their bodies when they are in a cooler environment. Hence, these animals require more oxygen
(O2) for more cellular respiration so that they can produce more energy to maintain their body temperature
3)Answer : In highly organised plants, there are two different types of conducting tissues −
xylem and phloem. Xylem conducts water and minerals obtained from the soil (via roots) to
the rest of the plant. Phloem transports food materials from the leaves to different parts of the plant body.
4)Answer : The components of xylem tissue (tracheids and vessels) of roots, stems, and leaves
are interconnected to form a continuous system of water-conducting channels that reaches all
parts of the plant. Transpiration creates a suction pressure, as a result of which water is forced
into the xylem cells of the roots. Then there is a steady movement of water from the root xylem
to all the plant parts through the interconnected water-conducting channels.
5)answer : Phloem transports food materials from the leaves to different parts of the plant body.
The transportation of food in phloem is achieved by utilizing energy from ATP. As a result of
this, the osmotic pressure in the tissue increases causing water to move into it. This pressure
moves the material in the phloem to the tissues which have less pressure. This is helpful in
moving materials according to the needs of the plant. For example, the food material, such as
sucrose, is transported into the phloem tissue using ATP energy.
hope you understood.....