Circulatory and Respiratory System

Science

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 small air sac in the lungs that allows for gas exchange with the blood.

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 type of blood vessel 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. Asthma is a condition where the tubes that carry air to the lungs become inflamed and narrow, leading to breathing difficulties.

The buildup of fatty deposits called plaque on artery walls

Atherosclerosis

The buildup of fatty deposits called plaque on artery walls. Atherosclerosis. It's a condition where arteries become narrowed and hardened due to the accumulation of plaque, reducing blood flow.

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 incoming blood from the body or lungs.

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 pressure of circulating blood against the walls of blood vessels.

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. A bronchus is an airway that carries air from the trachea directly into the lungs.

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 the smallest blood vessels in the body where oxygen and nutrients are delivered to cells and waste products are collected.

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. The circulatory system is like the body's transportation network, delivering essential substances to cells and removing waste.

The muscle below the lungs that controls breathing

Diaphragm

The muscle below the lungs that controls breathing. Diaphragm. It is a dome-shaped muscle that helps draw air into the lungs by contracting and flattening when you inhale.

A lung disease that destroys lung tissue and makes breathing difficult

Emphysema

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

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 to deliver oxygen and nutrients throughout the body.

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. It helps carry oxygen from your lungs to the rest of your body.

The voice box, it contains vocal cords

Larynx

The voice box, it contains vocal cords. Larynx. The larynx is a part of the throat that helps produce sound and protects the airway.

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 that helps you breathe by exchanging oxygen and carbon dioxide with the environment.

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 in the body that helps fight infections and removes waste.

A white blood cell that fights pathogens, a B cell or T cell

Lymphocyte

A white blood cell that fights pathogens, a B cell or T cell. Lymphocyte. Lymphocytes are immune cells that help protect the body from infections.

The group of cells in the right atrium of the heart that “set the pace” for the heartrate, the sinoatrial node

Pacemaker

The group of cells in the right atrium of the heart that set the pace for the heart rate, the sinoatrial node. Pacemaker. A pacemaker is a small device that helps regulate the heartbeat by sending electrical signals to the heart.

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 move food to the esophagus and air to the windpipe.

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 fluid portion of blood that transports nutrients, hormones, and waste products throughout the body.

A cell fragment that helps form blood clots

Platelet

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

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 moves from the heart to the lungs to get oxygen and then back to the heart.

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. It picks up oxygen in the lungs and delivers it to the rest of the body.

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 is the process by which oxygen-rich blood is carried from the heart to the body and then returns oxygen-poor blood back to the heart.

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 air move to and from your lungs.

A flap of tissue that prevents the backflow of blood in the heart or in a vein

Valve

A flap of tissue that prevents the backflow of blood in the heart or in a vein. A valve is a structure in the body that ensures blood flows in the right direction.

A blood vessel that carries blood to the heart

Vein

A blood vessel that carries blood to the heart. vein. A vein is a tube in the body that carries 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. A ventricle is a chamber in the heart that sends blood out to the body or lungs.

A large blood cell that fights disease

White blood cell

A large blood cell that fights disease. White blood cell. White blood cells are immune system cells that help protect the body against infections and disease.