Pulmonary circulation function

Carries deoxygenated blood from the heart to the lungs and oxygenated blood back from the lungs to the heart.

Systemic circulation function

Carries oxygenated blood to the rest of the body and deoxygenated blood from the body back to the heart.

Diagram of pulmonary and systemic circulation

Illustrates the flow of blood in pulmonary and systemic circulation.

Types of blood vessels

There are three types of blood vessels: capillaries, arteries, and veins.

An artery carries blood away from the heart.

Blood pressure in arteries

Arteries carry high pressure blood.

Artery wall structure

Arteries have a thick outer wall and a thick inner layer of muscle and elastic fibers to withstand pressure.

The central tube of an artery is narrow.

Illustration of an artery with labeled parts such as the thick outer wall, muscle layer, and narrow central tube.

Diagram of a vein showing its structure.

This diagram illustrates the structure of a vein.

Capillaries are the thinnest of all the blood vessels.

Their walls are only one cell thick.

Capillary walls are thin.

To allow for easy gas exchange between blood vessel and tissue.

Image of a capillary with one-cell-thick walls

Illustration of a capillary showing its thin walls for gas exchange.

The diagram shows various components of blood, including red blood cells, white blood cells, platelets, and plasma. Each component has a unique function and appearance.

Blood is often thought of as a single-component fluid.

In reality, blood is made up of four unique components.

Diagram showing the components of blood

Blood is composed of Plasma, Buffy Coat (leukocytes & platelets), and Erythrocytes.

Function of red blood cells

Carry fresh oxygen through the body and remove carbon dioxide

Shape of red blood cells

Disc-shaped to maximize oxygen-carrying surface area

Flexibility of red blood cells

Flexible to fit through tiny capillaries

Diagram showing red blood cells and hemoglobin structure

Illustration of red blood cells and hemoglobin binding oxygen

Image of red blood cells

Red blood cells are responsible for carrying oxygen throughout the body.

The primary function of white blood cells.

Act as the body’s defense system

How do some white blood cells protect the body?

By surrounding and consuming harmful microbes

Illustration of white blood cells with a boxing glove symbolizing defense

Visual representation of white blood cells acting as a defense mechanism

Diagram showing different types of white blood cells: neutrophil, eosinophil, basophil, monocyte, lymphocyte

Types of white blood cells: neutrophil, eosinophil, basophil, monocyte, lymphocyte

Amoeba under a microscope

An amoeba is a single-celled organism that moves and feeds by extending its pseudopodia.

White Blood Cells and Infections

Someone with an infection will often have a higher WBC count than when they’re well since more WBCs are being produced to battle the infection.

After the body has been challenged by some infections, some WBCs "remember" how to make specific antibodies that will quickly attack the same germ if it enters the body again.

Image of a white blood cell under a microscope.

White blood cells (WBCs) are crucial for fighting infections and can increase in number when the body is battling an infection.

Platelets help to repair tissues and close wounds both internally and externally.

Platelets are crucial for tissue repair and wound closure, functioning both inside and outside the body.

When needed, platelets grow into irregular shapes and stick together to form a plug over the wound.

Platelets change shape and aggregate to form a protective plug over wounds.

The blood cells and platelets are suspended in a substance called plasma.

Diagram of Blood Composition

The diagram illustrates the composition of blood, highlighting the proportions of plasma, buffy coat, and erythrocytes.

The four chambers of the heart have special names.

An upper chamber is called an atrium. A lower chamber is called a ventricle. Left side of diagram is called right. Right side is called left.

What is circulatory system's main function?

To transport substances around the body. Substances such as: oxygen, glucose, carbon dioxide, nutrients, water, and waste products.

The Circulatory System Flashcards

Student preview

87 questions

Show all answers

1.

FLASHCARD QUESTION

Front

The Circulatory System

Back

The circulatory system consists of the heart, blood vessels, and blood. It is responsible for transporting oxygen, nutrients, and waste products throughout the body.

2.

FLASHCARD QUESTION

Front

The main function of the circulatory system

Back

Transporting substances around the body, including oxygen, glucose, carbon dioxide, nutrients, water, and waste products.

3.

FLASHCARD QUESTION

Front

Three parts of the circulatory system

Back

Heart, blood, and blood vessels.

4.

FLASHCARD QUESTION

Front

Diagram of the human circulatory system

Back

Illustration of the circulatory system showing the heart, blood, and blood vessels.

5.

FLASHCARD QUESTION

Front

The circulatory system is described as a double system because it has two loops.

Back

This system consists of two loops that circulate blood throughout the body.

6.

FLASHCARD QUESTION

Front

Red color in the circulatory system diagram

Back

Represents oxygenated blood carrying oxygen molecules.

7.

FLASHCARD QUESTION

Front

Blue color in the circulatory system diagram

Back

Represents deoxygenated blood carrying carbon dioxide molecules.

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