1 Blood is composed of a fluid called __________ in which different types of cells are suspended.
Answer: plasma
Explanation: Blood is composed of plasma, a fluid in which various types of cells are suspended.
2 Red blood cells contain a red pigment called __________.
Answer: haemoglobin
Explanation: Red blood cells contain haemoglobin, which is a red pigment.
3 Platelets are responsible for forming __________.
Answer: blood clots
Explanation: Platelets are responsible for forming blood clots, as observed when Boojho’s bleeding stopped and a clot formed.
4 Arteries carry __________ blood from the heart to all parts of the body.
Answer: oxygen-rich
Explanation: Arteries carry oxygen-rich blood from the heart to all parts of the body.
5 Veins carry __________-rich blood from all parts of the body back to the heart.
Answer: carbon dioxide
Explanation: Veins carry carbon dioxide-rich blood back to the heart.
6 The throbbing sensation felt in arteries is called __________.
Answer: pulse
Explanation: The throbbing sensation felt in arteries is known as the pulse.
7 Capillaries join to form __________ that empty into the heart.
Answer: veins
Explanation: Capillaries join to form veins that eventually empty into the heart.
8 Blood donation is a harmless and painless process that can save __________.
Answer: lives
Explanation: Voluntary blood donation is harmless, painless, and can save lives.
9 __________ is the fluid that flows in blood vessels.
Answer: Blood
Explanation: Blood is the fluid that flows in blood vessels.
10 Donated blood is stored with special care in __________.
Answer: Blood Banks
Explanation: Donated blood is stored with special care in blood banks.
11 The heart is an organ that beats continuously to act as a pump for the transport of __________.
Answer: blood
Explanation: The heart acts as a pump for the transport of blood.
12 The heart has __________ chambers, with two upper chambers called atria and two lower chambers called ventricles.
Answer: four
Explanation: The heart has four chambers – two atria and two ventricles.
13 The partition between the chambers of the heart helps to avoid the mixing up of blood rich in __________ with the blood rich in carbon dioxide.
Answer: oxygen
Explanation: The partition between the chambers of the heart prevents the mixing of oxygen-rich and carbon dioxide-rich blood.
14 The rhythmic contraction followed by relaxation of the heart is called __________.
Answer: heartbeat
Explanation: The rhythmic contraction followed by relaxation of the heart constitutes a heartbeat.
15 Doctors use a __________ to amplify the sound of the heart and listen to heartbeats.
Answer: stethoscope
Explanation: Doctors use a stethoscope to listen to heartbeats.
16 The pulse rate per minute indicates the rate of __________.
Answer: heartbeats
Explanation: The pulse rate per minute indicates the rate of heartbeats.
17 Sponges and Hydra do not possess any __________ system.
Answer: circulatory
Explanation: Sponges and Hydra do not possess any circulatory system.
18 __________ discovered the circulation of blood.
Answer: William Harvey
Explanation: William Harvey discovered the circulation of blood.
19 William Harvey was called “circulator” by others for his views on __________.
Answer: blood circulation
Explanation: William Harvey was called “circulator” for his views on blood circulation.
20 Sponges and Hydra do not need a circulatory fluid like blood because the water in which they live brings __________ and oxygen to them.
Answer: food
Explanation: Sponges and Hydra do not need a circulatory fluid like blood because the water they live in brings food and oxygen to them.
21 The process of removal of wastes produced in the cells of living organisms is called __________.
Answer: excretion
Explanation: The process of removing waste products produced in the cells of living organisms is called excretion.
22 The waste dissolved in water is removed from the body as __________.
Answer: urine
Explanation: The waste dissolved in water is removed from the body as urine.
23 The vascular tissue responsible for transporting water and nutrients in plants is called __________.
Answer: xylem
Explanation: Xylem is the vascular tissue responsible for transporting water and nutrients in plants.
24 The major excretory product in humans is __________.
Answer: urea
Explanation: The major excretory product in humans is urea.
25 __________ is the process of periodic filtration of blood through an artificial kidney.
Answer: Dialysis
Explanation: The process of periodic filtration of blood through an artificial kidney is called dialysis.
26 The transport of water and minerals in plants is facilitated by __________ tissue.
Answer: xylem
Explanation: Xylem is the tissue responsible for transporting water and minerals in plants.
27 __________ and __________ form the excretory system in humans.
Answer: Kidneys, ureters
Explanation: Kidneys and ureters are the components of the excretory system in humans.
28 Plants absorb water and minerals through their __________.
Answer: roots
Explanation: Plants absorb water and minerals through their roots.
29 Leaves prepare food for the plant using water and __________ during photosynthesis.
Answer: carbon dioxide
Explanation: Leaves prepare food for the plant using water and carbon dioxide during photosynthesis.
30 The waste product excreted by some land animals like birds, lizards, and snakes is __________.
Answer: uric acid
Explanation: Some land animals excrete uric acid as their waste product.
31 __________ is the process by which plants release water through the stomata on the surface of the leaves.
Answer: Transpiration
Explanation: Process of transpiration as the release of water through the stomata.
32 The circulatory system in humans consists of the heart and __________.
Answer: Blood vessels
Explanation: The circulatory system in humans includes the heart and blood vessels.
33 Blood is red in color due to the presence of a red pigment called __________.
Answer: Hemoglobin
Explanation: Blood is red due to the presence of hemoglobin.
34 Arteries carry blood from the heart to __________.
Answer: All parts of the body
Explanation: Arteries carry blood from the heart to all parts of the body.
35 The excretory system of humans consists of two kidneys, two ureters, a urinary bladder, and __________.
Answer: Urethra
Explanation: Components of the human excretory system, including the urethra.
36 Sweat is composed of water, salts, and __________.
Answer: Urea
Explanation: Sweat contains water, salts, and urea, among other waste products.
37 Fish excrete waste substances such as __________, which directly dissolve in water.
Answer: Ammonia
Explanation: Fish excrete waste substances like ammonia, which dissolves directly in water.
38 Water and mineral nutrients are transported to the entire plant via the vascular tissue called __________.
Answer: Xylem
Explanation: The xylem is responsible for transporting water and minerals throughout the plant.
39 The vascular tissue for the transport of food to various parts of the plant is called __________.
Answer: Phloem
Explanation: Phloem as the vascular tissue responsible for transporting food in plants.
40 Transpiration generates a force that pulls up water absorbed by the roots from the soil, allowing it to reach the __________ and leaves.
Answer: Stem
Explanation: Transpiration generates a force that pulls up water to reach the stem and leaves of the plant.