Circulation and Respiration

Science

The use of oxygen by cells to break down food, and release carbon dioxide and energy

Respiration

The use of oxygen by cells to break down food, and release carbon dioxide and energy. Respiration is the process by which living cells obtain energy from food.

A blood vessel that carries blood away from the heart

Artery

A blood vessel that carries blood away from the heart. Artery. An artery is a tube-like structure that transports oxygen-rich blood from the heart to the rest of the body.

A disorder which narrows the airways to the lungs, making breathing difficult

Asthma

A disorder which narrows the airways to the lungs, making breathing difficult. Asthma. It is a condition where the airways become inflamed and constricted, leading to breathing difficulties.

One of the two upper chambers of the heart, it receives blood from the body

Atrium

One of the two upper chambers of the heart, it receives blood from the body. Atrium. The atrium is a part of the heart that collects blood coming in before it moves to other parts to get pumped out.

A tiny blood vessel that allows the exchange of gases, nutrients, and waste products

Capillary

A tiny blood vessel that allows the exchange of gases, nutrients, and waste products. Capillary. Capillaries are small blood vessels that connect arteries and veins, helping to deliver oxygen and nutrients to body tissues and remove waste.

The system of the heart, blood, and blood vessels, it moves oxygen, nutrients and waste

Circulatory system

The system of the heart, blood, and blood vessels, it moves oxygen, nutrients, and waste. Circulatory system. In simple terms, the circulatory system is the body's way of delivering essential materials to cells and removing waste products.

The muscular organ that pumps blood through the body

Heart

The muscular organ that pumps blood through the body. Heart. The heart is a powerful muscle that circulates blood, providing oxygen and nutrients to all parts of the body.

The death of heart tissue due to a blockage of its blood supply

Heart attack

The death of heart tissue due to a blockage of its blood supply. Heart attack. A heart attack happens when blood flow to the heart is blocked, causing part of the heart muscle to die.

The respiratory organ that absorbs oxygen from the air and removes carbon dioxide from the blood

Lung

The respiratory organ that absorbs oxygen from the air and removes carbon dioxide from the blood. Lung. The lung is a vital organ in the body that helps us breathe by exchanging gases with the environment.

A blood vessel that carries blood to the heart

Vein

A blood vessel that carries blood to the heart. Vein. Veins are tubes in the body that transport blood back to the heart.

One of the heart’s two lower chambers, it pumps blood out of the heart

Ventricle

One of the hearts two lower chambers, it pumps blood out of the heart. Ventricle. The ventricle is a part of the heart that helps pump blood to the body.

Blood pressure above the normal range, it is also called high blood pressure

Hypertension

Blood pressure above the normal range, it is also called high blood pressure. Hypertension. Hypertension is when the force of your blood against your artery walls is consistently too high, which can lead to health problems.

The force that the blood exerts on the walls of the arteries

Blood pressure

The force that the blood exerts on the walls of the arteries. Blood pressure. Blood pressure is the measure of how hard your blood pushes against the walls of your arteries as your heart pumps it around your body.

The muscle below the lungs that controls breathing

Diaphragm

The muscle below the lungs that controls breathing. Diaphragm. The diaphragm is a dome-shaped muscle that helps draw air into the lungs by moving downward when you inhale.

The heart, blood, and blood vessels that together transport nutrients to the entire body

Cardiovascular system

The heart, blood, and blood vessels that together transport nutrients to the entire body. Cardiovascular system. The cardiovascular system is like a network of roads in your body that moves nutrients and oxygen around to keep you alive and well.

The liquid part of blood, it is clear yellow and contains blood cells

Plasma

The liquid part of blood, it is clear yellow and contains blood cells. Plasma. Plasma is the component of blood that transports nutrients, hormones, and waste products throughout the body.

A disc-shaped cell that uses hemoglobin to carry oxygen from the lungs to the body

Red blood cell

A disc-shaped cell that uses hemoglobin to carry oxygen from the lungs to the body red blood cell. Red blood cells are like little oxygen delivery trucks in your blood.

The iron-containing protein in red blood cells that binds to oxygen

Hemoglobin

The iron-containing protein in red blood cells that binds to oxygen. Hemoglobin is a protein in red blood cells that carries oxygen to the body's organs and tissues.

A cell fragment that helps form blood clots

Platelet

A cell fragment that helps form blood clots. Platelet. Platelets are tiny pieces of cells in the blood that help stop bleeding by forming clots.

The nodes and vessels that return lymph to the blood, and help the body fight disease

Lymphatic system

The nodes and vessels that return lymph to the blood, and help the body fight disease. Lymphatic system. The lymphatic system is a network in the body that helps remove waste and fight infections.

A clear tissue fluid that moves between the blood and the lymph vessels, it transports fats and aids the immune system

Lymph

A clear tissue fluid that moves between the blood and the lymph vessels, it transports fats and aids the immune system. Lymph is a fluid that helps the body fight infections and maintain fluid balance.

An organ that filters pathogens from lymph, it contains lymphocytes

Lymph node

An organ that filters pathogens from lymph, it contains lymphocytes. Lymph node. Lymph nodes are small structures in your body that help fight infections by filtering harmful substances and storing immune cells.

The tubelike passage from the mouth, it carries food and air

Pharynx

The tubelike passage from the mouth, it carries food and air. Pharynx. The pharynx is a part of the throat that helps transport food to the esophagus and air to the lungs.

The windpipe, it carries air from the mouth and nose to the lungs

Trachea

The windpipe, it carries air from the mouth and nose to the lungs. Trachea. The trachea is a tube in your throat that helps you breathe by moving air to and from your lungs.

One of the two large tubes that connect the trachea to the lungs

Bronchus

One of the two large tubes that connect the trachea to the lungs bronchus. The bronchus is a passage that carries air from the windpipe into the lungs.

Tiny, thin-walled sacs in the lungs where oxygen and carbon dioxide are exchanged between air and the blood

Alveolus

Tiny, thin-walled sacs in the lungs where oxygen and carbon dioxide are exchanged between air and the blood. Alveolus. An alveolus is a tiny air sac in the lungs that helps your body get oxygen and get rid of carbon dioxide.

The voice box, it contains vocal cords

Larynx

The voice box, it contains vocal cords. Larynx. The larynx is an organ in the throat that helps produce sound and aids in breathing.

A lung disease that destroys lung tissue and makes breathing difficult

Emphysema

A lung disease that destroys lung tissue and makes breathing difficult. Emphysema. Emphysema is a condition where the air sacs in the lungs are damaged, causing difficulty in breathing.

The flow of blood between the heart and the lungs

Pulmonary circulation

The flow of blood between the heart and the lungs. Pulmonary circulation. It is the process where blood travels from the heart to the lungs to get oxygen and then back to the heart.

The flow of blood between the heart and all parts of the body, except the lungs

Systemic circulation

The flow of blood between the heart and all parts of the body, except the lungs, is called systemic circulation. Systemic circulation delivers oxygen-rich blood from the heart to the body's tissues and returns oxygen-poor blood back to the heart.

The fluid that carries nutrients to the body’s cells and removes waste

Blood

The fluid that carries nutrients to the bodys cells and removes waste. Blood. Blood is a vital liquid that circulates through the body, delivering oxygen and nutrients while removing carbon dioxide and waste.

The organs that transfer oxygen from the air to the body, like the nose, trachea and lungs

Respiratory system

The organs that transfer oxygen from the air to the body, like the nose, trachea and lungs, are part of the respiratory system. The respiratory system helps us breathe by bringing oxygen into the body and removing carbon dioxide.