(English Medium) ICSE Class 10 - CISCE Important Questions

Expand the following biological abbreviations: DPT

Aqueous humour, Vitreous humour, lris, Central canal

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.

State the exact location of the Chordae tendinae

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.

The vein that carries oxygenated blood.

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

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

The exact location of the tricuspid valve

The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the questions which follow: 

(i) Name the blood vessels labelled 1 and 2.
(ii) State the function of blood vessels labelled 5 and 8.
(iii) What is the importance of the blood vessel labelled 6?
(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(v) Draw a diagram of the different blood cells as seen in a smear of human blood.

Explain Diapedesis.

Give technical terms for The protective covering of the heart

Name the following:

The blood vessel which supplies blood to the liver.

Blood in the pulmonary artery or pulmonary vein (Which one contains less oxyhaemoglobin ?)

Mention the exact location of the Pulmonary semilunar valve

Give appropriate biological or technical terms for the following :

The complex consisting of a DNA strand and a core of histones