Click Once to Begin Human Body Systems Circulatory System Circulatory System 2 Respiratory System Respiratory System 2 Digestive System

Click Once to Begin

Human Body Systems

Circulatory System

Circulatory System 2

Respiratory System

Respiratory System 2

Digestive System

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Name the part of the heart.


Left ventricle



What is the main artery that carries oxygenated blood to the rest of the

body?



Aorta


What are arteries?




Arteries are vessels (tubes) that carry blood away from the heart.


Circulatory System 400Explain the function of red blood cells.



Red blood cells are the part of the blood that carries the oxygen to the cells of

the body.



Describe how blood moves through the circulatory system.



Deoxygenated blood flows into the heart through the inferior and superior vena cava. It enters the right atrium and goes through the tricuspid valve into the right ventricle. The blood then goes through the pulmonary artery to the lungs. Oxygenated blood then returns to the heart through the pulmonary veins into the left atrium. It then travels through the mitral valve into the left ventricle. From here it flows through the aorta to the rest of the body.


Circulatory (part II) 100

Name the part of the heart.



Pulmonary artery



What are the smallest of the vessels; they deliver oxygen and energy to the

cells, and they connect the arteries and the veins?



Capillaries



What are veins?



Veins are vessels (tubes) that carry blood back to the heart.



Explain the function of white blood cells.



White blood cells are the part of the blood that fights bacterial and viral

infections.



Explain the purpose of the circulatory system.



The purpose of the circulatory system is to pump blood throughout the body; the blood carries oxygen and nutrients to the cells of the body.



Name the part of the respiratory

system.



Bronchi




system.



Alveoli



Explain what the epiglottis is.



The epiglottis is a flap of tissue that closes over the trachea like a trapdoor; it makes sure food goes

down the esophagus to the stomach (not down the trachea and into the lungs).



Explain what the diaphragm is.



The diaphragm is the muscle below the lungs that helps a person inhale and

exhale.



Describe how a molecule of oxygen travels through the respiratory

system.



A molecule of oxygen first enters through your nose or mouth. Then, it goes down your pharynx/throat and into your windpipe, also known as your trachea. After that, the air molecule goes through the bronchi into your right or left lung. As it travels through the bronchioles, the carbon dioxide and oxygen are exchanged in the grape-like sacs called alveoli.


Respiratory (part II) 100


system.



Trachea




system.



Diaphragm



Explain what alveoli are and what they do.



The alveoli are little grape-like sacs inside the lungs where oxygen and

carbon dioxide are exchanged.


Respiratory (part II) 400Explain what the bronchi are.



The bronchi are tubes that branch off the trachea inside the lungs.



Explain the purpose of the respiratory system.



The purpose of the respiratory system is to breathe in oxygen and breathe out

carbon dioxide.


Digestive System 100

What is the tube that connects the mouth to the stomach?



Esophagus



Where is the digestive system are enzymes and acids are added and food is churned? (Some digestion

occurs there, too.)



Stomach


Moon Phases 300

What is the purpose of the digestive system?


Daily Double!!!


The purpose of the digestive system is break down food into energy and

nutrients for the body.


Digestive System 400Explain what the liver, pancreas,

and gall bladder do.



The gall bladder, pancreas, and liver all produce enzymes that help break

down food.



Explain the two functions of the small intestine.



The small intestine is where:1. Most digestion occurs 2. The energy and nutrients from the

food are absorbed into the bloodstream


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Click Once to Begin Human Body Systems Circulatory System Circulatory System 2 Respiratory System Respiratory System 2 Digestive System