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Question
Cardiac muscles are ______.
Options
hemoglobin
alkaline
diaphragm
red bone morrow
acidic
voluntary
involuntary
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Solution
Cardiac muscles are involuntary.
RELATED QUESTIONS
MULTIPLE CHOICE TYPE:
(Select the most appropriate option)
The valve present between the right atrium and the right ventricle is the
(a) tricuspid valve
(b) bicuspid valve
(c) semi-lunar valve
(d) mitral valve
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
Given below is a certain structure, write its chief functional activity.
Erythrocytes - ______.
What is Endothelium?
Name the three kinds of blood vessels found in human beings. With the help of suitable diagrams, differentiate between them.
Draw the structure of human heart and label its parts
Veins have valves at intervals in their inner lining whereas the arteries do not have valves. Explain.
Match the following.
| Group A | Group B |
| (1) Lungs | (a) Circulation |
| (2) Stomach | (b) Respiration |
| (3) Heart | (c) Co-ordination |
| (4) Brain | (d) Digestion |
The valve which prevents back flow of blood in the veins and lymph vessels is ______.
Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:
 |
- Label the parts 1 and 4 indicated in the diagram.
- Which of the above mentioned number is the thickest artery? Also write its name.
- Mention the number and chamber of the heart which has the thickest muscular wall.
- Which of the above numbers/structures has the maximum number of blood capillaries?
- Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.
