(a) Pulmonary artery originates from the right ventricle.
NCERT Page-286 / N-201
Body fluids and circulation
278351
Open type blood vascular system is found in
1 earthworm
2 lizard
3 cockroach
4 toad
Explanation:
(c) Open type blood vascular system is a type of circulatory system in which nutrients and waste are moved through the body with the help of a fluid which flows freely through the body cavity, rather than being contained in veins. Many invertebrates like insects (eg, cockroach) and shellfish have an open circulatory system, with the exact composition of the circulating fluid varying, depending on the animal species involved.
NCERT Page-282 / N-197
Body fluids and circulation
278352
Which of the following have closed circulatory system?
1 Annelids
2 Chordates
3 Platyhelminthes
4 Both (a) and (b)
Explanation:
(d) Annelids and chordates have closed circulatory system.
NCERT Page-282 / N-197
Body fluids and circulation
278353
' $P$ ' wave of ECG occurs before the
1 onset of ventricular contraction.
2 end of arterial contraction.
3 beginning of atrial contraction.
4 none of the above.
Explanation:
(c) The P-wave indicates atrial depolarization, which causes atrial systole. During this wave, the impulse of contraction is generated by the SA node.
(a) Pulmonary artery originates from the right ventricle.
NCERT Page-286 / N-201
Body fluids and circulation
278351
Open type blood vascular system is found in
1 earthworm
2 lizard
3 cockroach
4 toad
Explanation:
(c) Open type blood vascular system is a type of circulatory system in which nutrients and waste are moved through the body with the help of a fluid which flows freely through the body cavity, rather than being contained in veins. Many invertebrates like insects (eg, cockroach) and shellfish have an open circulatory system, with the exact composition of the circulating fluid varying, depending on the animal species involved.
NCERT Page-282 / N-197
Body fluids and circulation
278352
Which of the following have closed circulatory system?
1 Annelids
2 Chordates
3 Platyhelminthes
4 Both (a) and (b)
Explanation:
(d) Annelids and chordates have closed circulatory system.
NCERT Page-282 / N-197
Body fluids and circulation
278353
' $P$ ' wave of ECG occurs before the
1 onset of ventricular contraction.
2 end of arterial contraction.
3 beginning of atrial contraction.
4 none of the above.
Explanation:
(c) The P-wave indicates atrial depolarization, which causes atrial systole. During this wave, the impulse of contraction is generated by the SA node.
(a) Pulmonary artery originates from the right ventricle.
NCERT Page-286 / N-201
Body fluids and circulation
278351
Open type blood vascular system is found in
1 earthworm
2 lizard
3 cockroach
4 toad
Explanation:
(c) Open type blood vascular system is a type of circulatory system in which nutrients and waste are moved through the body with the help of a fluid which flows freely through the body cavity, rather than being contained in veins. Many invertebrates like insects (eg, cockroach) and shellfish have an open circulatory system, with the exact composition of the circulating fluid varying, depending on the animal species involved.
NCERT Page-282 / N-197
Body fluids and circulation
278352
Which of the following have closed circulatory system?
1 Annelids
2 Chordates
3 Platyhelminthes
4 Both (a) and (b)
Explanation:
(d) Annelids and chordates have closed circulatory system.
NCERT Page-282 / N-197
Body fluids and circulation
278353
' $P$ ' wave of ECG occurs before the
1 onset of ventricular contraction.
2 end of arterial contraction.
3 beginning of atrial contraction.
4 none of the above.
Explanation:
(c) The P-wave indicates atrial depolarization, which causes atrial systole. During this wave, the impulse of contraction is generated by the SA node.
(a) Pulmonary artery originates from the right ventricle.
NCERT Page-286 / N-201
Body fluids and circulation
278351
Open type blood vascular system is found in
1 earthworm
2 lizard
3 cockroach
4 toad
Explanation:
(c) Open type blood vascular system is a type of circulatory system in which nutrients and waste are moved through the body with the help of a fluid which flows freely through the body cavity, rather than being contained in veins. Many invertebrates like insects (eg, cockroach) and shellfish have an open circulatory system, with the exact composition of the circulating fluid varying, depending on the animal species involved.
NCERT Page-282 / N-197
Body fluids and circulation
278352
Which of the following have closed circulatory system?
1 Annelids
2 Chordates
3 Platyhelminthes
4 Both (a) and (b)
Explanation:
(d) Annelids and chordates have closed circulatory system.
NCERT Page-282 / N-197
Body fluids and circulation
278353
' $P$ ' wave of ECG occurs before the
1 onset of ventricular contraction.
2 end of arterial contraction.
3 beginning of atrial contraction.
4 none of the above.
Explanation:
(c) The P-wave indicates atrial depolarization, which causes atrial systole. During this wave, the impulse of contraction is generated by the SA node.
