Open Circulatory System

Q. What is the circulatory system of cockroach?

Q.

What is incomplete double circulation?

Q.

Explanation for open type of circulatory system

Q.

Match the following

$\begin{array}{cc}\text{Column-I}& \text{Column-II}\\ \text{A. Superior vena Cava}& \text{(i) Carries deoxygenated blood to lungs}\\ \text{B. Inferior vena Cava}& \text{(ii) Carries oxygenated blood from lungs}\\ \text{C.Pulmonary artery}& \text{(iii) Brings deoxygenated blood from lower part of body to right atrium}\\ \text{S. Pulmonary vein}& \text{(iv) Brings deoxygenated blood from upper part of body to right atrium}\end{array}$

1. A – ii, B – iv, C – iii, D – i

2. A – iv, B – i, C – ii, D – iii

3. A – iv, B – iii, C – i, D – ii

4. A – iv, B – i, C – iii, D – ii

Q. During joint diastole,

1. both the auricles receive oxygenated blood
2. tricuspid valve and mitral valve remain closed
3. semilunar valves open and dub sound is heard
4. left atrium receives oxygenated blood through pulmonary veins

Q.

Which of the following is not an important function of the vertebrate circulatory system

1. transport of nutrients and respiratory gases

2. regulation of body temperature

3. protection of the body by circulating antibodies

4. removal of waste products for excretion from the body

Q. Which of the following is not the function of cnidoblasts?

1. Digestion of food
2. Anchorage
3. Defense
4. Capture of prey

Q.

How strong is the human heart?

Q.

What are the 3 types of circulatory systems?

Q. Figure shows schematic plant of blood circulation in humans with labels A to D. Identify the label and give
its function/s.

1. A-Pulmonary vein-takes impure blood from body parts, $P{O}_2=60mmHg$
2. B-Pulmonary artery – takes blood from heart to lungs, $P{O}_2=90mmHg$
3. C-Vena Cava-takes blood from body parts to right auricle, $PC{O}_2=45mmHg$
4. D-Dorsal aorta – takes blood from heart to body parts, $P{O}_2=95mmHg$

Q.

The coelom in arthropods is reduced and known as ‘haemocoel’ because

1. coelomic fluid flows in the blood vessel

2. blood flows in the blood vessels present in the coelom

3. coelom is filled with haemoglobin

4. blood flows in the coelom

Q. Which one of the following statements is NOT CORRECT?

1. Blood circulation happens in closed vessels in arthropods
2. In annelids, the tissues are not in direct contact with the circulating fluid
3. In fishes, the heart pumps deoxygenated blood only
4. The circulatory system transports excretory substances to the excretory organs

Q. Which of the following organism have a closed blood vascular system?

1. Starfish
2. Leech
3. Silkworm
4. Squid

Q. Closed blood vascular system is found in

1. Chordates only
2. Vertebrates only
3. Birds and mammals.
4. Annelids and chordates.

Q. Ganesh found an organism and decided to observe its circulatory system in his lab. He found that the body tissues were in direct contact with the circulating fluid. The organism might be a/an:

1. Chordate
2. Annelid
3. Arthropod
4. Both A and C

Q.

Assertion: Many advanced invertebrates have an open circulatory system.​

Reason: The open circulatory system is open to the environment.​

1. If both assertion and reason are true and the reason is the correct explanation of assertion.​
2. If both assertion and reason are false​
3. If an assertion is true but the reason is false​
4. If both assertion and reason are true then the reason is not the correct explanation of assertion​

Q. "Bundle of His" is a part of which one of the following organs in humans?

1. Heart
2. Kidney
3. Pancreas
4. Brain

Q.

Eustachian valve which is of no significance in an adult mammal, is a vestigial organ, a vestige of

1. Spiral valve

2. Sinus venosus

3. Sino-auricular valve

4. Semilunar valves

Q.

Open vascular system is found in:

1. fish

2. man

3. prawn

4. snake

Q. Blood flow in humans is known as double circulation. Why?

Q. Triploblastic and acoelomate animals are exemplified by:

1. Platyhelminthes
2. Sponges
3. Cnidarians
4. Annelids

Q. Absence of head, unsegmented body and endoskeleton of the calcareous plate are characteristics exhibited by members of which phylum?

1. Mollusca
2. Arthropoda
3. Echinodermata
4. None of the above

Q. The contraction of which muscles bring both the mandibles close -

1. Adductor
2. Both A and B
3. Abductor
4. Tergosternal

Q. Why four-chambered heart is beneficial?

1. It increases blood pressure.
2. It pumps blood to the lungs more often, so blood is better oxygenated.
3. It separates oxygenated and deoxygenated blood.
4. It lowers blood pressure and the threat of heart attacks.
5. It supplies the brain with more blood for cognition.

Q.

Open vascular system is found in:

1. fish

2. man

3. prawn

4. snake

Q. Fill in the blanks (A, B, C and D) from the characters given (1 to 6) and choose the option containing the correct matches.
I. Phylum Echinodermata are ...A....
II. Phylum Mollusca has a ...B....
III ....C... of Echinoderms is its distinctive character.
IV Echinodermata got their name from ...D....
Given characters
l . radially symmetrical
2. larvae
3. endoskeleton of calcareous ossicles
4. water vascular system
5. radula
6. mantle cavity

1. A-1, B-6, C-4, D-3
2. A-1, B-4, C-3, D-2
3. A-1, B-5, C-3, D-2
4. A-1, B-2, C-5, D-6

Q. Very short answer type.
What is the name of the straw coloured fluid left after clotting of blood?

Q. Alary muscles in cockroach are associated or connected with

1. Heart
2. Legs
3. Alimentary canal
4. Trachea

Q. Which of the following vertebrates were the first to evolve a three chambered heart for proper distribution of oxygen in the body?

1. Fishes
2. Reptiles
3. Amphibians
4. Birds
5. Mammals

Q. Raman was hospitalized for chest discomfort and pain. Doctors advised him angioplasty. What is the process? Why do you think is it required.