Advertisements
Advertisements
Question
Write the features that distinguish between the two.
Open and Closed circulatory system
Advertisements
Solution
| Open circulatory system | Closed circulatory system |
| 1. Blood pumped by heart passes through large vessels into open spaces or body cavities called sinuses | 1. Blood pumped by the heart is always circulated through a closed network of blood vessels |
| 2. Less advantageous | 2. More advantageous |
| 3. Flow of fluid cannot be more precisely regulated | 3. Flow of fluid can be more precisely regulated |
| 4. It is present in arthropods molluscs, and hemichordates | 4. It is found in annelids and chordates |
APPEARS IN
RELATED QUESTIONS
Describe the evolutionary change in the pattern of heart among the vertebrates.
Sino-atrial node is called the pacemaker of our heart. Why?
A patient’s chart reveals that he has a cardiac output of 7500 mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)
Distinguish between mitral valve and semi lunar valve.
Right ventricular wall is thinner than the left ventricular wall. Why?
What are the heart sounds? When and how are these sounds produced?
Which among the followings is correct during each cardiac cycle?
Read the following statements and choose the correct option
Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.
Define the following terms and give their location?
Purkinje fibre
The walls of ventricles are much thicker than atria. Explain.
Write the features that distinguish between the two.
Sino-atrial node and Atrio-ventricular node
Answer the following:
Which part of heart is responsible for initating and maintaining its rhythmic activity?
Answer the following:
What is specific in the heart of crocodiles among reptilians?
In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.
Cardiac activities of the heart are regulated by ______.
- Nodal tissue
- A special neural centre in the medulla oblongata
- Adrenal medullary hormones
- Adrenal cortical hormones
Choose the correct answer from the options given below:
Following are the stages of pathway for conduction of an action potential through the heart:
- AV bundle
- Purkinje fibres
- AV node
- Bundle branches
- SA node
Choose the correct sequence of pathway from the options given below:
