Basics of blood and heart - class-VII
Description: basics of blood and heart | |
Number of Questions: 24 | |
Created by: Akash Patil | |
Tags: human organ systems digestive system, respiratory system and circulatory system human body breath and blood of life transportation in plants and animals our body- its internal organ system circulation of blood evs transportation in living organisms transportation in animal and plants biology human body and organ system |
The portion of heart which doesn't receive proper blood supply becomes
Read the following statements carefully.
$(1)$ In fishes the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart
$(2)$ The openings of the right and the left ventricles into the pulmonary artery and the aorta respectively are provided with the mitral valves.
$(3)$ The nodal musculature has the ability to generate action potential without any external stimuli, i.e., it is auto-excitable
$(4)$ The T-wave of ECG represents depolarization of the ventricles
Which of the given two statements are correct?
Why it is necessary to separate oxygenated and deoxygenated blood in mammals and birds?
The upper chambers of the heart are called
When the muscles of the heart relax
When the muscles of the heart contract?
Which of the following statements is false?
The lower chambers of the heart are called
.......... pumps deoxygenated blood to the lungs.
Blood from the left ventricle is pumped to
.............. receives oxygenated blood from the lungs.
Which of the following is covered by pericardium membrane?
The blood with no oxygen is received in the
The separation of the atria and ventricle helps to
In aquatic mammals
Papillary muscles occur in
Ridges present in the ventricles are
Chordae tendineae are found in
In order for the blood to flow from right ventricle to left ventricle in mammalian heart, it must flow through
Ventricular diastole takes place due to activity of
Iter (Aqueduct of Sylvius) is found between
Choose the correct answer from the alternatives given.
The heart sound dup is produced when:
Choose the correct answer from the alternatives given.
Blood enters the heart because muscles of:
Choose the correct answer from the alternatives given.
In normal heart action: