Small blood vessels where gas and nutrient exchange occurs.

Large arteries that carry oxygenated blood away from the heart.

Veins that return deoxygenated blood to the heart.

Structures that filter blood and produce urine.

An organ that processes nutrients and detoxifies harmful substances.

A muscle that aids in digestion.

A gland that produces hormones.

A type of blood cell that fights infections.

The voluntary contraction of muscles in the stomach.

The involuntary constriction and relaxation of muscles in the intestine.

The process of digestion in the mouth.

The absorption of nutrients in the small intestine.

The part of the throat behind the mouth and nasal cavity.

A muscle that helps in swallowing food.

The tube that connects the throat to the stomach.

The area of the throat that contains the vocal cords.

Organs that allow for the exchange of oxygen and carbon dioxide.

Muscles that help in the movement of the diaphragm.

Tissues that store carbon dioxide for later use.

Cells that produce red blood cells.

The lower chamber of the heart that pumps blood out.

The upper chamber of the heart that receives blood.

A type of blood vessel that carries oxygenated blood.

The part of the heart that separates the left and right sides.

A simple sugar that is an important energy source.

A complex carbohydrate found in plants.

A type of protein used for muscle building.

A fat molecule that stores energy.

The upper chamber of the heart that receives blood.

The lower chamber of the heart that pumps blood out.

A type of blood vessel that carries oxygenated blood.

The part of the heart that regulates heartbeat.

The main passageways that branch from the trachea to the lungs.

Small air sacs in the lungs where gas exchange occurs.

The tube that carries air to the lungs.

The muscle that controls breathing.

The tube that connects the throat to the stomach.

A muscular organ that pumps blood throughout the body.

The part of the brain responsible for vision.

The organ that produces bile for digestion.

A tiny blood vessel where exchange of substances occurs.

A large blood vessel that carries oxygenated blood away from the heart.

A type of white blood cell involved in immune response.

A structure in the kidney that filters blood.

The organ that pumps blood throughout the body.

A muscle that helps in digestion.

An organ that filters waste from the blood.

A gland that produces hormones.

The opening at the end of the digestive tract.

A type of digestive enzyme.

A muscle that controls bowel movements.

The first part of the digestive system.

A small organ that stores bile.

A large organ that produces insulin.

An organ that filters blood.

A muscle that aids in digestion.

Small air passages in the lungs that lead to alveoli.

Large air passages that connect the trachea to the lungs.

Muscles that control the expansion of the lungs.

Blood vessels that supply oxygen to the lungs.

A hormone that regulates blood sugar levels.

A type of carbohydrate found in fruits.

A mineral essential for bone health.

A protein that aids in muscle growth.

The part of the digestive system where most digestion and absorption occurs.

The organ responsible for detoxifying chemicals and metabolizing drugs.

The section of the digestive system that stores waste before excretion.

The muscular tube that connects the throat to the stomach.

Cellular structures that synthesize proteins.

Organelles responsible for energy production.

Components of the cell membrane.

Structures that store genetic information.

The system responsible for breathing and gas exchange.

The system that circulates blood throughout the body.

The system that digests food and absorbs nutrients.

The system that regulates body temperature.