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प्रश्न
Cardiac muscles are ______.
पर्याय
hemoglobin
alkaline
diaphragm
red bone morrow
acidic
voluntary
involuntary
उत्तर
Cardiac muscles are involuntary.
संबंधित प्रश्न
Draw the structure of a human heart and label its parts.
A blood vessel which has small lumen and thick wall is ______.
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
Artery and vein (direction of blood flow)
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Multiple choice questions. Tick ( ✓ ) the correct choice:
The four blood groups in humans are
Describe the functions of the: Heart
Name the organ from which oxygenated blood goes into the heart
The table below is designed to indicate the transport of certain substances in our body. Fill in the blanks with suitable answers.
| Substance | From | To | |
| 1. | ______ | Lungs | Whole Body |
| 2. | Carbon Dioxide | ______ | ______ |
| 3. | Urea | ______ | ______ |
| 4. | Digested Carbohydrates | Intestines | ______ |
| 5. | ______ | ______ | Target Organs |
| 6. | Heat | ______ | Whole Body |
Veins have valves at intervals in their inner lining whereas the arteries do not have valves. Explain.
Given below is a schematic representation of the circulatory system in man. Study the same and answer the questions that follow:
(i) Label the parts 1 to 4 indicated in the diagram.
(ii) Give one difference between parts 1 and 2 based on:
(a) their structure
(b) the nature of blood flowing through them.
(iii) What is the specific name of the type of blood circulation that takes place between the heart and the lungs?
(iv) Name the valve found at the beginning of the part labeled 3.
