Available Answers

1. 1.

   Fill in the blanks.

   1. Arteries and veins are joined by a network called ________.
   2. Water reaches great heights in tall trees due to suction pull by ________ process.
   3. In human beings, the main excretory product is ________.
   4. Xylem and phloem together are called ________ tissue.
   5. The veins which carry oxygenated blood are called ________ vein.
2. 2.

   Give one word for the following:

   1. the blood cells that contain haemoglobin
   2. the instrument which is used to measure heartbeat
   3. a tissue that helps in upward transportation of water and minerals
   4. the fluid part of the blood that consists of blood cells
   5. the tubes that carry urine from the kidney to the bladder
3. 3.

   Write T for the true and F for the false statements.

   1. Arteries carry blood from the heart to all parts of the body.
   2. Salt and urea are removed along with water as sweat.
   3. Pulmonary artery carries deoxygenated blood.
   4. Human heart is a two-chambered muscular organ.
   5. Our skin acts as an excretory organ.
4. 4.

   Match the columns.

   A	B
   1. Artery	a. Cooling effect
   2. Xylem	b. Translocation of food
   3. Heart	c. Thickest blood vessel
   4. Phloem	d. Muscular organ
   5. Stomata	e. Transport of water

    

5. 5.

   Why is transport of materials necessary in plants or animals? Explain.

6. 6.

   Describe the composition of blood.