Biology · General Awareness

Human Circulatory System

846 Questions

The human circulatory system explores the network of blood vessels, heart valves, and structural pathways. Test items often target blood flow sequences and specific vascular functions. Mastering these details is vital for biology preparation.

Heart valves and chambersBlood vessels and venulesArteries of the bodyBlood supply to organsCentral nervous system supply

Human Circulatory System Questions

Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

In non chordates, blood flow is _________ is ventral vessel and __________ in dorsal vessel.

  1. Backward, backward

  2. Backward, forward

  3. Forward, backward

  4. Forward, forward
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In most non-chordates (like earthworms), the blood flow in the ventral vessel is directed forward (anteriorly) and in the dorsal vessel, it is directed backward (posteriorly).

Multiple choice biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney

The renal artery of the new kidney, which is previously connected from the abdominal aorta in the donor will be connected to ........... artery in the recipient.

  1. Superior vena cava.

  2. External iliac.

  3. Inferior aorta.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During a kidney transplant usually the failed kidney is not removed instead the transplanted kidney is placed in the iliac fossa (cavity) Conventionally, the kidney receives blood from the renal artery and the renal vein drains blood into the inferior vena cava. However, since the kidney is placed in the iliac fossa that receives blood from the external iliac artery the transplanted kidney is connected to the external iliac artery and accordingly to the external iliac vein. This is also done to make the further surgeries, if required to be less complicated. So, the correct answer is 'External iliac'

Multiple choice biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney
The renal vein of the new kidney is connected to the ......................... in the recipient, which in the donor, drains blood to the inferior vena cava.

  1. External iliac vein

  2. Internal iliac vein

  3. Vena cava

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is option B i.e."Internal iliac vein"
The internal iliac vein drains blood from the visceral organs in the pelvic region. The internal iliac vein may double all these veins and tributaries join together to form the inferior vena cava.

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

.......... fluid is found in ventricles of the brain.

  1. Sinovial

  2. Cerebrospinal

  3. Serum

  4. Plasma
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cerebrospinal fluid (CSF),  is an alkaline fluid present in the brain and spinal chord. It is formed primarily, in the ventricles of the brain. It supports the brain and provides lubrication between surrounding bones and the brain and spinal cord. It act as buffer for the cerebrum.
So, the correct answer is option B.

Multiple choice zoology respiration in organisms respiration in human beings respiration and associated structures respiration in humans

....... circulation is related with lungs.

  1. Coronary

  2. Biliary

  3. Pulmonary

  4. Renal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The blood pumped by the right ventricle enters the pulmonary artery, whereas the left ventricle pumps blood into the aorta.The deoxygenated blood pumped into the pulmonary artery is passed onto the lungs from where the oxygenated blood is carried by the pulmonary veins into the left atrium. This pathway constitutes the pulmonary circulation. 

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Humans have a

  1. Closed circulatory system

  2. Circulatory system

  3. Open circulatory system

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The circulatory patterns are of two types open or closed. Open circulatory system is present in arthropods and molluscs in which blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses. Annelids and chordates (example humans) have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels. This pattern is considered to be more advantageous, as the flow of fluid can be more precisely regulated.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

In closed circulatory system, blood is enclosed by

  1. Tubes

  2. Ducts

  3. Valves

  4. Vessels
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In closed circulatory system, blood flows through closed chambers called as vessels. In open circulatory system, the blood flows in the closed vessel which further opens into a body cavity called haemocoel.

So, the correct answer is option D.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

In circulatory system, valves occur in

  1. Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatics

  2. Both vertebrate and invertebrate hearts

  3. Vertebrate heart only

  4. Both vertebrate and invertebrate hearts and their blood vessels.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Valves are essential in circulatory systems to ensure unidirectional flow. They are found in the hearts of vertebrates, the lymphatics of vertebrates, and in various vessels of both vertebrates and some invertebrates.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Which is incorrect?

  1. Veins are typically larger in diameter than arteries

  2. Because of their small size, blood flows more rapidly in capillaries than in other parts of circulatory system

  3. Walls of arteries are elastic enabling them to stretch and shrink during changes in blood pressure

  4. Veins contain more blood than any other part of circulatory system.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blood flows slowest in the capillaries because the total cross-sectional area of the capillary bed is much larger than that of arteries or veins, which is necessary for efficient exchange of nutrients and gases.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

In closed circulatory system 

  1. The cells and tissues are directly bathed in the blood pumped out by heart

  2. Arteries and veins are lacking

  3. The capillaries are largest blood vessels and closed at their ends

  4. Blood circulates through a series of vessels of varying diameters
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Closed circulatory system has blood enclosed all the time within the vessels. In this system, blood is pumped by the heart through vessels.
  • It is more structured and controlled.

So, the correct option is 'Blood circulates through a series of vessels varying diameters'

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Choose the correct answer from the alternatives given.
Which of the following is the part of a closed, but not an open, circulatory system?

  1. Heart

  2. Haemocoel

  3. Capillary beds

  4. Ostia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In an open circulatory system, the blood is not confined within blood vessels. The blood bathes the organs and tissues directly. Because of this the blood and the interstitial fluid have no distinction. Thus, the term hemolymph is used. The hemolymph is pumped by the heart through the vessels into the sinuses and then to the surrounding cells where the exchange of materials occur. The hemolymph is taken back to the heart through the ostia that close via the valves during heart contraction.

So, the correct option is 'Capillary beds'.

Multiple choice types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

Choose the correct answer from the alternatives given.
In the sinuses of an open circulatory system,-blood is not segregated from:

  1. urine

  2. interstitial fluid

  3. digestive cavity

  4. cytoplasm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The open circulatory system is common to molluscs and arthropods. Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. So, the blood is not segregated from interstitial fluid.

So, the correct option is 'Interstitial fluid'.

Multiple choice evs circulation of blood circulatory system and organs basics of blood and heart transportation in living organisms

When the muscles of the heart contract?

  1. Blood is pumped from the right ventricle into the lungs.

  2. Blood flows from the lungs into the left auricle.

  3. Blood is pumped into the right auricle from all over the body.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During ventricular systole, the deoxygenated blood from the right ventricle enters the pulmonary trunk, which carries blood to lungs for oxygenation. Thus option A is the correct answer. 

Multiple choice evs circulation of blood circulatory system and organs basics of blood and heart transportation in living organisms

Which of the following statements is false?

  1. Oxygenated blood is pumped to all other parts of the body from left ventricle.

  2. Gaseous exchange in the alveoli happens through capillaries.

  3. Blood-from the right side of the heart enters into left side through right auricle and left auricle.

  4. Lungs oxygenate the deoxygenated blood.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pulmonary artery arises from the right ventricle and carries deoxygenated blood to lungs for oxygenation. Lungs oxygenate the deoxygenated blood. This oxygenated blood is pumped to all parts of the body. Thus option C is the correct answer.