The Circulatory System Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

Questions and Answers

What is the main function of the circulatory system?

Producing blood cells
Regulating body temperature
Filtering toxins from the blood
Transporting substances throughout the body (correct)

The circulatory system is made up of blood only.

False (B)

What type of tissue makes up red blood cells?

connective tissue

The heart is primarily composed of __________ tissue.

muscle

Signup and view all the answers

Match the components of blood with their respective functions:

Red blood cells = Transport oxygen and carbon dioxide White blood cells = Fight infections Platelets = Aid in blood clotting

Signup and view all the answers

Which type of blood cell is responsible for immune response?

Leukocytes (A)

Signup and view all the answers

Platelets make up about 45% of your blood volume.

False (B)

Signup and view all the answers

Which gas is transported from tissues to the lungs?

carbon dioxide

Signup and view all the answers

Blood vessels and the heart are lined with __________ tissue.

epithelial

Signup and view all the answers

What role do nerve tissues play in the circulatory system?

Tell the heart muscle to contract (B)

Signup and view all the answers

Flashcards

What is the circulatory system's main function?

The organ system responsible for transporting vital substances throughout the body.

What are the components of the circulatory system?

The circulatory system is made up of blood, the heart, and blood vessels.

What does blood transport throughout the body?

Blood is a connective tissue that circulates throughout the body, carrying oxygen, nutrients, heat energy, carbon dioxide, hormones, and waste.

What is the role of red blood cells?

Red blood cells, also known as erythrocytes, make up 45% of your blood volume. They contain hemoglobin, which binds oxygen and carbon dioxide for transport. Oxygen is delivered to tissues, and carbon dioxide is transported to the lungs.

Signup and view all the flashcards

What do white blood cells do?

White blood cells, also known as leukocytes, make up 1% of your blood volume. Macrophages engulf and destroy infections, while lymphocytes produce antibodies that target and neutralize threats.

Signup and view all the flashcards

What is the role of platelets?

Platelets are involved in blood clotting, preventing excessive bleeding from injuries.

Signup and view all the flashcards

What do arteries do?

Arteries carry oxygenated blood away from the heart to the body's tissues.

Signup and view all the flashcards

What do veins do?

Veins carry deoxygenated blood back to the heart from the body's tissues.

Signup and view all the flashcards

What are capillaries and what is their role?

Capillaries are tiny blood vessels that connect arteries and veins. They are the sites of gas exchange, delivering oxygen and picking up carbon dioxide.

Signup and view all the flashcards

What is the role of the heart in the circulatory system?

The heart is a vital muscle that pumps blood throughout the body.

Signup and view all the flashcards

Study Notes

The Circulatory System

The circulatory system is the organ system responsible for transporting substances throughout the body.
The circulatory system comprises blood, the heart, and blood vessels.
The circulatory system contains four types of tissue: connective, epithelial, cardiac muscle and nerve tissue.
Blood is a type of connective tissue that circulates throughout the body.
Blood transports oxygen, nutrients, heat energy, carbon dioxide, hormones, and waste.

Blood

Blood is 45% red blood cells.
Red blood cells (erythrocytes) contain hemoglobin, which has four sites where oxygen and carbon dioxide can attach.
Oxygen is transported from the lungs to tissues in the blood.
Carbon dioxide is transported from tissues to the lungs in the blood.
Blood is also 1% white blood cells (leukocytes).
Macrophages ("eat" infections) are a type of white blood cell.
Lymphocytes form antibodies that attach to and destroy infections.
Platelets make up less than 1% of blood and are responsible for blood clotting.
Plasma is 55% of blood and is the liquid part.
Plasma is rich in protein, controls blood volume and blood pressure, and carries dissolved minerals, nutrients, and wastes.

The Heart

The heart contains three types of tissue: cardiac muscle, nerve, and connective tissue.
The heart is divided into four chambers.
Blood flows from the body to the heart, to the lungs, and back to the body.
The heart's chambers are the right atrium, right ventricle, left atrium, and left ventricle.

Blood Vessels

There are three types of blood vessels: arteries, veins, and capillaries.
Arteries carry blood away from the heart with high pressure.
Artery walls are thick and muscular to withstand the pressure.
Veins carry blood toward the heart.
Capillaries are small blood vessels with very thin walls (one cell thick).
Blood cells pass through capillaries one at a time, and materials (like oxygen and carbon dioxide) are exchanged.
All blood vessels have an endothelium layer, a smooth muscle layer, and a connective tissue layer.