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 bio-chemistry digestion liver functions of the liver secretory organs

Which of the following is not a blood vessel entering the liver?

  1. Hepatic artery

  2. Hepatic portal vein

  3. Hepatic vein

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

The hepatic artery and hepatic portal vein carry blood into the liver. The hepatic vein carries blood away from the liver toward the inferior vena cava.

Multiple choice bio-chemistry digestion liver functions of the liver secretory organs

Sinusoids are characterised by

  1. Irregular lumen

  2. Absence of endothelium

  3. Mixing of blood and lymph

  4. Both B and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sinusoids are characterized by a form of terminal blood channel consisting of a large, irregular anastomosing vessel having a lining of reticulo-endothelium and found in the liver, heart, spleen, pancreas, and the adrenal, parathyroid, carotid, and hemolymph glands.

So, the correct option is 'Irregular lumen'.

Multiple choice

Arteries are found in which body system?

  1. digestive

  2. excretory

  3. circulatory

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

Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body, making them a key component of the circulatory system.

Multiple choice

Where does your heart pump deoxygenated blood?

  1. intestines

  2. lungs

  3. brain

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

The heart pumps deoxygenated blood to the lungs, where it releases carbon dioxide and picks up fresh oxygen. This oxygenated blood then returns to the heart to be pumped to the rest of the body.

Multiple choice

What system of organs brings oxygen into your body?

  1. circulatory

  2. digestive

  3. excretory

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

The respiratory system, which includes the nose, trachea, and lungs, is responsible for the exchange of gases, specifically bringing oxygen into the body and removing carbon dioxide.

Multiple choice

The circulatory system connects ___________________.

  1. the lungs to the mouth

  2. the chambers of the heart

  3. the intestines of your body

  4. the cells in your body
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The circulatory system, consisting of the heart, blood, and blood vessels, acts as a transport network that connects all cells in the body to deliver nutrients and oxygen while removing waste.

Multiple choice

Which side of the heart contains oxygen-poor blood?

  1. LEFT

  2. RIGHT
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs for oxygenation. The left side receives oxygenated blood from the lungs to pump to the rest of the body.

Multiple choice

Where do veins bring blood? 

  1. to the heart

  2. from the heart

  3. to and from the heart

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Veins are blood vessels that carry deoxygenated blood back to the heart, whereas arteries carry blood away from the heart.

Multiple choice

Alveoli are surrounded by blood vessels.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alveoli are tiny air sacs in the lungs that are closely associated with a dense network of pulmonary capillaries to facilitate gas exchange.

Multiple choice

Which path correctly shows how oxygen moves from the lungs to the body's cells?

  1. systemic circulation to the heart to pulmonary circulation

  2. pulmonary circulation to the heart to systemic circulation

  3. pulmonary circulation to systemic circulation to the heart

  4. the heart to pulmonary circulation to systemic circulation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxygenated blood leaves the lungs via pulmonary circulation to the heart, which then pumps it through systemic circulation to reach the rest of the body's cells.

Multiple choice

The flow of blood between the heart and lungs is known as ________.

  1. cardiac circulation

  2. systemic circulation

  3. pulmonary circulation

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

Pulmonary circulation is the specific circuit that transports deoxygenated blood from the heart to the lungs for gas exchange and returns oxygenated blood to the heart.