7th Grade Circulatory System Study Guide
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| The cardiovascular system consists of the . . . | show 🗑
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| What are the functions of the cardiovascular system? | show 🗑
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| What is the heart? | show 🗑
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| show | Over 3 billion times
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| How many chambers in total does the heart have? | show 🗑
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| show | atria
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| the two lower chambers are called the . . . | show 🗑
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| show | They receive blood that comes into the heart.
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| What is the function of the ventricles? | show 🗑
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| What is the plural of atrium? | show 🗑
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| The atria are separated from the ventricles by. . . | show 🗑
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| What is a valve? | show 🗑
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| show | They separate the atria from the ventricles, and they are also located between the ventricles and the large blood vessels that carry blood away from the heart.
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| What are the two main phases of the action of the heart? | show 🗑
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| show | The lungs
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| The left side of the heart pumps blood to. . . | show 🗑
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| What is the pacemaker? | show 🗑
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| What is the aorta? | show 🗑
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| What is the septum? | show 🗑
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| show | It prevents oxygen-rich and oxygen-poor blood from mixing in the heart.
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| show | It pumps oxygen-rich blood to all parts of the body.
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| show | It receives oxygen-rich blood from the lungs.
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| show | It receives the spent blood from the body. It is low in oxygen and high in the waste product carbon dioxide.
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| show | It pumps oxygen-poor blood to the lungs when it contracts.
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| What are the three types of blood vessels? | show 🗑
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| What are arteries? | show 🗑
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| show | capillaries
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| What are capillaries? | show 🗑
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| show | Substances are exchanged between the blood and body cells.
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| show | veins
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| show | Blood vessels that carry blood back to the heart.
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| In how many directions does blood travel? | show 🗑
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| show | When blood from the body flows into the right atrium, it contains a little oxygen and a lot of carbon dioxide.
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| show | lungs
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| show | The lungs
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| From the left ventricle, the blood is pumped into which artery? | show 🗑
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| show | A push or a pull
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| When blood leaves the heart, it travels through. . . | show 🗑
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| show | The first vessels that branch off from the aorta.
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| The coronary arteries carry blood to the . . . | show 🗑
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| show | Very thick
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| show | three
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| What does the innermost layer of an artery wall consist of? | show 🗑
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| show | muscle tissue.
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| The outer wall of an artery is made up of. . . | show 🗑
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| What is a pulse? | show 🗑
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| show | Muscles that expand and contract without our thinking about it.
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| show | One cell thick
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| show | diffusion
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| show | the process by which molecules move from an area in which they are highly concentrated to an area in which they are less concentrated.
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| Blood pressure is measured with an instrument called a. . . | show 🗑
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| show | Veins carry blood back to the heart.
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| What factors help move blood through veins? | show 🗑
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| show | The pressure of the blood against the walls of blood vessels.
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| What causes blood pressure? | show 🗑
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| As blood moves away from the heart, its pressure.... | show 🗑
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| Blood pressure is lowest in. . . | show 🗑
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| show | Because the farther away from the heart the blood moves, the lower the force of the ventricles.
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| What exerts the highest pressure? | show 🗑
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| Blood pressure is recorded how? | show 🗑
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| What is the meaning of the first number in a blood pressure? | show 🗑
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| Is the second number in a blood pressure measurement higher or lower than the first? | show 🗑
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| What does the 2nd number in the blood pressure reading measure? | show 🗑
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| Blood is made up of how many components? | show 🗑
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| show | red blood cells, white blood cells, plasma, and platelets.
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| show | 45%
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| show | plasma
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| show | Plasma
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| 90 percent of plasma is. . . | show 🗑
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| show | Ten percent
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| show | Carries molecules that come from the breakdown of digested food; carries vitamins, minerals, and chemical messengers, and carries away waste products
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| There are how many groups of plasma proteins? | show 🗑
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| What do the three groups of plasma proteins do? | show 🗑
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| Where are red blood cells produced? | show 🗑
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| show | Red blood cells take up oxygen in the lungs and deliver it to cells elsewhere in the body.
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| show | hemoglobin
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| What is hemoglobin? | show 🗑
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| Where do hemoglobin pick up oxygen? | show 🗑
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| show | plasma
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| show | No.
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| Red blood cells live for how long? | show 🗑
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| show | They look like disks with pinched-in centers.
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| show | White blood cells are the body's disease fighters.
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| show | Some recognize disease-causing organisms and alert the body; others produce chemicals to fight the invaders; still others surround and kill the organisms.
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| There is one white cell to how many red cells? | show 🗑
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| show | Bigger
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| show | Yes.
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| show | They can live for months or even years.
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| What are platelets? | show 🗑
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| show | Platelets collect and stick to the vessel at the site of the wound and release chemicals that start a chain reaction that produces fibrin.
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| show | A chemical that weaves a net of tiny fibers across the wound in a blood vessel. As more platelets and blood cells become trapped in the net, a blood clot forms.
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| show | A dried blood clot on the skin surface
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| show | The transfer of blood from one person to another
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| show | A, B, AB, and O
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| show | No.
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| What is the lymphatic system? | show 🗑
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| show | The fluid inside the lymphatic system
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| What happens to some of blood's fluid as it travels through the capillaries? | show 🗑
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| show | Lymph consists of water and dissolved materials such as glucose, as well as some white cells that have left the capillaries.
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| What is glucose? | show 🗑
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| Are lymphatic vessels part of the cardiovascular system? | show 🗑
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| What are lymph nodes? | show 🗑
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| What do lymph nodes do? | show 🗑
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| What is the leading cause of death in the United States? | show 🗑
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| show | A condition in which an artery wall thickens as a result of the buildup of fatty materials.
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| What is cholesterol? | show 🗑
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| What is a heart attack? | show 🗑
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| show | Another name for high blood pressure
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| show | Lower than 140/90.
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| Why is hypertension bad? | show 🗑
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| Why is hypertension called the "silent killer?" | show 🗑
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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