(English Medium) ICSE Class 10 - CISCE Important Questions for Biology

Foetus : Amnion : : Heart: ______

Give biological reasons for the following statements:

The left ventricle of the heart has a thicker wall than the right ventricle. 

The diagram given below represents a section of the human heart. Answer the questions that follow :

(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.

Give appropriate biological/technical terms for the following: Cellular components of blood containing hemoglobin

The mineral ion needed for the formation of blood clot is :
A. Potassium
B. Sodium
C. Calcium
D. Iron

State the exact location of the Chordae tendinae

State the main function of the Lymphocytes of blood

Differentiate between LUBB and DUP (names of the valves whose closure produce the sound)

the Biological/technical term for The vein which drains the blood from the intestine to the liver.

the Biological/technical term for Blood vessels carrying blood to the left atrium.

Give scientific reasons: Blood flows in arteries in spurts and is under pressure.

The vein that carries oxygenated blood.

fill in the blanks with suitable functions: Eustachian Tube and ______

Oxygen combines with haemoglobin present in RBC and forms _____.

The diagrams given below are cross sections of blood vessels:

(i) Identify the blood vessels A, B and C.
(ii) Name the parts labelled 1 to 3.
(iii) Name the type of blood that flows through A.
(iv) Mention one structural difference between A and B.
(v) In which of the above vessels does exchange of gases actually take place?

Differentiate between the RBC and WBC (Shape)

The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:

(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.

Explain Pulse

Identify the odd one in each set : Haemoglobin, Glucagon, Iodopsin, Rhodopsin

Match the items given in Column