Circulation and Respiration

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Vein

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