Alveoli
Microscopic air sacs at the end of the bronchioles where gas exchange between air and blood takes place.
Organs, bones, muscles, and structures of the human body. Browse 47 detailed entries below, or filter by letter.
This is the full body parts index — 47 detailed body parts, each with its own profile. Click any name to open the full entry.
For body parts, every profile covers body system, location, function, and scientific name.
Microscopic air sacs at the end of the bronchioles where gas exchange between air and blood takes place.
The largest artery in the body, carrying oxygen-rich blood from the heart's left ventricle to the rest of the body.
A small finger-shaped pouch attached to the cecum at the start of the large intestine.
Thick-walled blood vessels that carry oxygenated blood from the heart to tissues throughout the body.
Either of the two upper chambers of the heart that receive blood returning from circulation.
Microscopic blood vessels where the exchange of oxygen, nutrients, and waste between blood and tissues occurs.
A pair of major arteries in the neck that supply blood to the brain, face, and neck tissues.
Eight small bones arranged in two rows that form the bony framework of the wrist.
The collarbone, a horizontal S-shaped bone connecting the arm to the rest of the skeleton.
A dome-shaped sheet of muscle separating the thoracic and abdominal cavities and serving as the main muscle of breathing.
A small pear-shaped organ that stores and concentrates bile produced by the liver.
A muscular pump in the thoracic cavity that circulates blood through the body via the cardiovascular system.
The final section of the digestive tract that absorbs water and electrolytes and forms feces from undigested material.
The voice box, a cartilage-framed organ in the neck that produces sound and protects the lower airway.
The largest internal organ, performing hundreds of metabolic, storage, and detoxification functions.
A pair of spongy organs in the thoracic cavity responsible for gas exchange between air and blood.
Five long bones in the palm of the hand that connect the wrist to the fingers.
The oral cavity, the entry point of the digestive tract where food is taken in, chewed, and mixed with saliva.
The hollow space behind the nose where inhaled air is filtered, warmed, and humidified before reaching the lungs.
An elongated gland behind the stomach that produces digestive enzymes and hormones regulating blood sugar.
The kneecap, a triangular sesamoid bone embedded in the tendon of the quadriceps in front of the knee.
A bowl-shaped ring of bones at the base of the spine that supports body weight and houses pelvic organs.
The bones of the fingers and toes, arranged in three segments per digit except the thumb and great toe.
The throat, a muscular tube that carries air to the larynx and food to the esophagus.
A short, large vessel that carries deoxygenated blood from the right ventricle to the lungs.
One of two long bones of the forearm, located on the thumb side and rotating around the ulna.
The final straight section of the large intestine that stores fecal material before elimination.
Twelve pairs of curved bones that form the rib cage and protect the organs of the chest.
The shoulder blade, a flat triangular bone that connects the humerus to the clavicle and supports shoulder motion.
The bony framework of the head that protects the brain and forms the structure of the face.
A long, coiled tube where most chemical digestion and nutrient absorption take place.
The breastbone, a flat bone in the middle of the chest that anchors the ribs and protects the heart and great vessels.
A J-shaped muscular sac that stores swallowed food and begins protein digestion through acid and enzymes.
Hard mineralized structures embedded in the jaws that cut, tear, and grind food during the first stage of digestion.
A muscular organ in the mouth that handles food during chewing and swallowing and supports taste and speech.
The windpipe, a cartilage-reinforced tube that conducts air between the larynx and the bronchi.
One of two long bones of the forearm, located on the little finger side and forming the main hinge with the humerus at the elbow.
Blood vessels that return deoxygenated blood from the body's tissues back to the heart at low pressure.
The two largest veins in the body, returning deoxygenated blood from systemic circulation to the right atrium of the heart.
Either of the two lower chambers of the heart that pump blood out into systemic or pulmonary circulation.
The 33 bones that stack to form the spinal column, supporting the body and protecting the spinal cord.
That's our current full list of body parts. We add new entries every week — if there's a body part you'd like us to cover, let us know and we'll write it up.
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