7th Grade Circulatory System Vocabulary

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Questions and Answers

What is the function of the Cardiovascular System?

Facilitates digestion

Absorbs nutrients

Regulates sleep patterns

Carries needed substances to the heart and wastes away from the heart (correct)

What is the heart?

A hollow, muscular organ that pumps blood throughout the body

What does the pacemaker do?

Regulates heartbeat by sending signals to the heart muscle to contract

What are atriums?

Upper chambers of the heart that receive blood from the rest of the body Signup and view all the answers

What are ventricles?

The two lower chambers of the heart that pump blood out to the lungs and body Signup and view all the answers

What is the aorta?

The body's largest artery that takes oxygenated blood from the left ventricle to the body Signup and view all the answers

What is the function of the septum?

Divides the right and left chambers of the heart Signup and view all the answers

What is the role of valves in the heart?

Prevent blood from flowing backward Signup and view all the answers

What are blood vessels?

Tubes that transfer blood around the body Signup and view all the answers

What are capillaries?

Microscopic vessels through which diffusion takes place between the blood and cells of the body Signup and view all the answers

What do arteries do?

Carry blood away from the heart Signup and view all the answers

What do veins do?

Carry blood back to the heart Signup and view all the answers

What is plasma?

Liquid part of blood; 90% water, 10% dissolved materials Signup and view all the answers

What do red blood cells do?

Carry oxygen from the lungs to the body cells Signup and view all the answers

What do white blood cells do?

Fight disease Signup and view all the answers

What are platelets?

Cell fragments that help clot blood Signup and view all the answers

What is the lymphatic system?

Transports excess fluid from tissues to blood Signup and view all the answers

What is hemoglobin?

Iron-containing protein in red blood cells that carries oxygen for delivery to cells Signup and view all the answers

What is fibrin?

Protein that forms the basis of a blood clot Signup and view all the answers

What is a stroke?

A serious condition that occurs when an artery of the brain breaks or becomes blocked Signup and view all the answers

What is arrhythmia?

A condition in which the heart beats with an irregular or abnormal rhythm Signup and view all the answers

What is a heart attack?

Condition that occurs when an artery becomes blocked, disrupting blood flow to the heart Signup and view all the answers

What is hypertension?

A condition in which the force of the blood against the artery walls is too high Signup and view all the answers

What is atherosclerosis?

A condition in which an artery wall thickens as a result of the buildup of fatty materials Signup and view all the answers

What are coronary arteries?

Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle Signup and view all the answers

What is lymph?

Fluid that is filtered out of the blood Signup and view all the answers

What is deoxygenated blood?

Blood without oxygen Signup and view all the answers

What is oxygenated blood?

Blood with oxygen Signup and view all the answers

Study Notes

Cardiovascular System Overview

The cardiovascular system carries essential substances to and from the heart.
It removes waste products to maintain homeostasis.

Heart Anatomy

The heart is a hollow, muscular organ responsible for pumping blood through the body.
Upper chambers called atriums receive blood from the body, while lower chambers called ventricles pump blood to lungs and other body parts.
The septum divides the right and left chambers, maintaining proper blood flow.

Pacemaker Function

Located in the right atrium, the pacemaker regulates heartbeat by sending signals for heart muscle contractions.

Blood Vessels

Blood vessels consist of arteries, veins, and capillaries, each serving distinct functions.
Arteries carry blood away from the heart and have thick muscle layers.
Veins transport blood back to the heart and possess valves to prevent backflow.
Capillaries are microscopic and facilitate diffusion between blood and body cells.

Components of Blood

Plasma, comprising 90% water and 10% dissolved materials, is the liquid component of blood.
Red blood cells transport oxygen using iron-containing hemoglobin, while white blood cells combat infections.
Platelets are essential for blood clotting.

Lymphatic System

The lymphatic system collects excess fluid from tissues and returns it to the bloodstream, aiding in immune function.

Strokes occur when a brain artery is blocked or breaks, affecting brain function.
Arrhythmia is characterized by an irregular heartbeat, which can disrupt normal blood flow.
Heart attacks result from blocked arteries preventing blood flow to the heart muscle.
Hypertension involves high blood pressure against artery walls, increasing heart disease risk.
Atherosclerosis is the thickening of artery walls due to fatty material buildup, leading to reduced blood flow.

Blood Oxygen Levels

Oxygenated blood is rich in oxygen, essential for cellular respiration.
Deoxygenated blood lacks oxygen and is returned to the heart for re-oxygenation.

Coronary Arteries

Coronary arteries branch from the aorta, supplying oxygen-rich blood directly to heart tissues.

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Description

Test your knowledge of the circulatory system with this quiz designed for 7th graders. Learn key terms such as cardiovascular system, heart, pacemaker, and atriums through definitions and descriptions. Perfect for reinforcing your understanding of how the heart functions in the human body.