Download 2 - Balbharatipp.org

BAL BHARATI PUBLIC SCHOOL, PITAMPURA, DELHI-110034
CLASS 10 CORE ASSIGNMENT
Topic:
Life processes ( Half yearly)
Sub Topic: Transportation in plants and animals
Q1. What are the components of the transport system in humans?
Ans. Human transport system has 2 components: blood vascular system and lymphatic system
Blood vascular system consists of blood, blood vessels, and heart.
Lymphatic system consists of lymph, lymph nodes and lymph vessels
Q2. What is the composition of blood?
Ans. Blood is made up of plasma and 3 types of cells: Red blood cells ( transport oxygen and contain haemoglobin) ,
White blood cells( phagocytosis of germ cells) and blood platelets( blood clotting).
Q3. Explain the different blood vessels.
Ans. Arteries: take the oxygenated blood from heart to other body parts.( except pulmonary artery)
Veins: take deoxygenated blood towards heart from various body parts( except pulmonary vein)
Capillaries: carry out exchange of materials between blood and living cells.
Q4. State the functions of lymph.
Ans. 1) Collection of extra tissue fluid and passing it back into blood.
2) attracting and carrying germs to the lymph nodes.
3) picks up digested fats from the alimentry canal for pouring into blood.
Q5. State the functions of blood.
Ans. 1) transport of nutrients
2) transport of oxygen
3) transport of carbon dioxide
4) ) transport of hormones and
5) regulation of body temperature.
Q6.Distinguish between arteries and veins.
Arteries
Carry blood from
heart to organs.
Veins
Carry blood from
organs to heart.
Blood flow is
rapid.
Blood flows with
jerks.
Blood flows under
pressure.
Thick walled.
Blood flow is slow.
Blood flows
smoothly.
Blood flows at
little pressure.
Thin walled.
Q7. Describe double circulation in human heart.
Ans. Left atriumLeft ventricleAorta body parts vena cava right atriumright ventriclepulmonary
arterylungs pulmonary vein  left atrium
Q8. Draw a well labelled diagram of human heart diagram.
Q9. Name the components of transport system in plants.
Ans. Xylem ( that moves water and minerals from soil to aerial parts), phloem ( that carries food from leaves or storage
organs to the areas of utilisation.)
Q10. Define transpiration and write its advantages.
Ans. It’s the loss of water in the form of water vapour from the exposed part of a plant.
Importance:
Cooling, transport of water and minerals, loosing excess water and rising water till the top of a plant.
Q11. Draw a diagram showing transpiration from aerial surface causing ascent of sap.
Ascent of sap: it’s the upward movement of absorbed water from roots to the top of
the plant. Its also called transpiration pull.
Q12.Why do birds and mammals have a septum between the right and left sides of heart?
Ans. These animals spend a lot of energy in keeping their body temperature constant.so, this mechanism provides
efficient supply of oxygen to all body parts.
Q13.Explain the heart structure in reptiles and amphibians.
Ans. These organisms have a 3 chambered heart as, the energy needs are lesser because the body temp.
Varies with the temp. of the environment.
Q14. Explain the heart structure of a fish.
Ans. The heart is 2 chambered in fishes. The blood is oxygenated in the gills and then transported to
The rest of the body.
Q15. What are the differences between xylem and phloem?
Xylem
Conducts water
Has only 1 type of living tissue
Has two types of conducting elements ie tracheids
and vessels
Phloem
Conducts food
Has 3 types of living tissues
Has only 1 type of conducting elements ie sieve
tubes.
Q16. Distinguish between: blood and lymph
Blood
Red in colour
Opaque
Contains rbc’s
Contains platelets
Q17. Define:
Lymph
Pale yellow in colour
Semi transparent
Rbc’s are absent
absent
Ans.
1) Transpiration: The loss of water in the form of water vapour from the aerial parts of the plant
2) Translocation: The transport of soluble products of photosynthesis from leaves to the other
Parts of plant body is called translocation.
Q18. What is root pressure?
Ans. Salts accumulated in the basal part of the xylem cause osmotic entry of water into xylem and
Form a column of water. It creates a positive pressure called root pressure. However, it is unable
to push water to great heights.
Q19. What is blood pressure . How is it measured?
Ans. It is the pressure exerted by flow of blood on the elastic wall of arteries. Its measured by an
Instrument called sphygmomanometer.
Q20. What is the role of septum?
Ans. It prevents the mixing of oxy and deoxygenated blood in animals likehumans and birds to
ensure the efficient supply of blood to all body parts.