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Study Guide for the Circulatory System Test

What does the circulatory system transport?

Nutrients ( glucose, fatty acid + glycerol, amino acids), blood, oxygen, CO2, H2O, hormones, antibodies, waste (urea and salts)

Parts of circulatory system

Heart- pump, blood vessels, blood

2 types of circulatory system

Open circulatory system and Closed circulatory system

Open circulatory system

Blood is not contained in blood vessels ( ex. grasshopper)

Closed circulatory system

Blood is contained in blood vessels ( ex. humans)


Is a muscular organ - 1. smooth muscle 2. striated muscle( react quickly to charges) -

Where is the heart located?

Beneath the sternum, tilted to the left

What does a heart do?

Pumps blood to entire body

The heart is composed of four chambers

Left atrium (top), right atrium (top), left ventricle ( bottom), right ventricle ( bottom)

Right atrium

Receives blood from the body, and the blood is high in CO2 ( deoxygenated)

Right ventricle

Receives blood from the right atrium, and pumps blood to the lungs

Left atrium

Receives blood from the lungs, and the blood is rich in oxygen ( oxygenated)

Left ventricle

Receive blood from left atrium, and pumps blood to the body

What do the arteries do?

Carry blood away from the blood away from the heart, and carry oxygenated blood


Have thick walls, and are elastic

Examples of arteries

Aorta- largest artery, and pulmonary artery

Pulmonary artery

Carry blood to lungs, and carry deoxygenated blood

What do capillaries do?

They connect arteries to veins


Have thin walls, site of diffusion, and one cell thick

What do veins do?

Carry blood, and carry deoxygenated blood


Have thin walls, and are muscle contractions that force blood back to heart

Examples of veins

Vena Cavas, and Pulmonary veins

Vena Cavas

Largest veins, and bring blood back to heart

Pulmonary veins

Carry blood from lungs to heart and carry deoxygenated blood

Systemic circulatory

Heart --> Body --> Heart

Pumonary circulatory

Heart --> Lungs --> Heart

Coronary circulatory

Heart --> Heart --> Heart

bllod through body

Rt. atrium --> rt. ventricle --> pulmonary arteries --> lungs --> pulmonary veins --> lt. atrium --> lt. ventricle --> aorta--> body--> vena cava--> rt. atrium


Is a tissue, and is composed of platelets, red blood cells, white blood cells, and plasma


45 % H2O, and carries the dissolved substances

Red blood cells

Made in bone marrow, have no nucleus, carry O2, and hemoglobin that binds O2

White blood cells

Made in bone marrow, have a nucleus, and fight infection ( phagocytosis)


Fragments of blood cells, and clot blood

Blood types

A, B, AB - universal recipient, O- universal donor

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