Transportation in Animals and Plants

Q1. Fill in the blanks.

                         i.        The blood from the heart is transported to all parts of the body by the arteries.

                        ii.        Haemoglobin is present in red blood cells.

                       iii.        Arteries and veins are joined by a network of capillaries.

                       iv.        The rhythmic expansion and contraction of the heart is called heartbeat.

                        v.        The main excretory product in human beings is urea.

                       vi.        Sweat contains water and salts.

         vii.        Kidneys eliminate the waste materials in the liquid form called urine.

         viii.        Water reaches great heights in the trees because of suction pull caused by transpiration.

                        ix.        In plants, water is transported through xylem.

Q2. True/False

                           i.        Water absorption through roots can be increased by keeping the plants under the fan. True

                          ii.        Transpiration also cools the plant. True

                         iii.        Veins carry blood from the heart to all parts of the body. False

                         iv.        Excretory system of human consists of the heart and blood vessels. False

                         v.        In most animals the blood that circulates in the body distributes food and oxygen to different cells of the body. True

                         vi.        The major excretory product in humans is urea. True

          vii.        Animals such as sponges and Hydra also possess circulatory system. False

Q3. Which vessel carries oxygen rich blood?

Ans. Arteries carries oxygen rich blood.

Q4. What happens when you get a cut on your body?

Ans. Blood flows out when we get a cut on our body.

Q5. What does the circulatory system mainly consists of?

Ans. Circulatory system consists of the heart and blood vessels.

Q6. What is excretion?

Ans. Removal of waste products from the body is called excretion.

Q7. What is called pulse rate?

Ans. The number of beats per minute is called the pulse rate.

Q8. What system removes waste from the body?

Ans. The excretory system removes waste from the body.

Q9. What is the fluid part of blood called?

Ans. The fluid part of the blood is called plasma.

Q10. What does human sweat contain?

Ans. The sweat contains water and salts.

Q11. What is the function of phloem?

Ans. Phloem transports food from the leaves to the rest of the plant.

Q12. Which instrument is used to measure blood pressure?

Ans. A sphygmomanometer is used to measure blood pressure.

Q13. Name the major excretory product in humans.

Ans. The major excretory product in humans is urea.

Q14. What is haemoglobin?

Ans. Red blood cells (RBC) which contain a red pigment called haemoglobin.

Q15. Which veins carry oxygen rich blood?

Ans. Pulmonary vein carries oxygen-rich blood from the lungs to the heart.

Q16. What makes the blood look red?

Ans.  Blood contain a red pigment called haemoglobin give blood its red color.

Q17. How much urine an adult human being normally passes in 24 hours?

Ans. An adult human being normally passes about 1ñ1.8 L of urine in 24 hours.

Q18. What urine consists of?

Ans. The urine consists of 95% water, 2.5% urea and 2.5% other waste products.

Q19. What is a tissue?

Ans. A tissue is a group of cells that perform specialised function in an organism.

Q20. What is normal resting pulse rate of human body?

Ans. A resting person usually has a pulse rate between 72 and 80 beats per minute.