Human Anatomy Vocabulary in English
20 essential human anatomy words with definitions and example sentences — bones, organs, and body systems for B2–C1 ESL learners.
Human anatomy vocabulary is essential for anyone studying medicine, nursing, biology, or sport science in English. Words such as artery, tendon, vertebra, and diaphragm appear constantly in textbooks, lectures, and clinical settings. For B2 and C1 learners, mastering these precise terms makes it far easier to read academic material and communicate accurately about the body.
This page covers 20 key anatomy words, ranging from the building blocks of the body — tissue, muscle, and bone — to specific structures such as the cranium, the larynx, and the pelvis. Many of these terms come from Latin and Greek roots, which means they also appear across other European languages and in everyday medical English. Learning them will help you describe injuries, understand diagnoses, and follow scientific explanations with confidence.
If you are building your medical vocabulary more broadly, you may also find our Body Parts vocabulary and Health vocabulary pages useful, along with our pages on medical procedures, dentistry, and neuroscience. This list focuses specifically on the structural anatomy of the human body — the systems, organs, and skeletal parts that form the foundation of medical study.
Word List
| Word / Phrase | Meaning | Example Sentence |
|---|---|---|
| skeleton | the internal framework of bones that supports the body and protects its organs | The adult human skeleton is made up of 206 separate bones. |
| organ | a self-contained part of the body that performs a specific function, such as the heart or liver | The liver is the largest internal organ in the human body. |
| tissue | a group of similar cells that work together to perform a particular function | Muscle tissue contracts to produce movement throughout the body. |
| muscle | a band of fibrous tissue that can contract and relax to produce movement | The biceps muscle bends the arm at the elbow joint. |
| tendon | a tough band of fibrous tissue that connects a muscle to a bone | The Achilles tendon connects the calf muscle to the heel bone. |
| ligament | a band of tough, flexible tissue that connects two bones and stabilises a joint | She tore a ligament in her knee while playing football. |
| artery | a blood vessel that carries oxygen-rich blood away from the heart to the rest of the body | The aorta is the largest artery, carrying blood directly from the heart. |
| vein | a blood vessel that carries deoxygenated blood back towards the heart | Doctors usually draw blood from a vein in the inner elbow. |
| nerve | a bundle of fibres that carries electrical signals between the brain and the rest of the body | The injury damaged a nerve, leaving his hand numb for several weeks. |
| cartilage | firm, flexible connective tissue that cushions joints and shapes structures such as the nose and ears | The cartilage in the knee acts as a shock absorber between the bones. |
| abdomen | the part of the body between the chest and the pelvis, containing the stomach, intestines, and other organs | The surgeon made a small incision in the lower abdomen. |
| thorax | the part of the body between the neck and the abdomen, enclosed by the ribs; the chest | The heart and lungs are housed within the thorax, protected by the rib cage. |
| vertebra | any one of the small bones that form the backbone or spine | A fractured vertebra in the lower back can cause severe pain and limited movement. |
| joint | a point where two or more bones meet, usually allowing movement | The knee is the largest and most complex joint in the human body. |
| cranium | the part of the skull that encloses and protects the brain | The cranium fuses fully only several years after birth. |
| diaphragm | the dome-shaped muscle below the lungs that contracts to draw air into the body during breathing | When the diaphragm contracts and flattens, the lungs expand and fill with air. |
| marrow | the soft tissue inside bones where blood cells are produced | Bone marrow produces red and white blood cells throughout a person's life. |
| larynx | the hollow organ in the throat that holds the vocal cords and produces sound; the voice box | The larynx vibrates as air passes over the vocal cords, creating speech. |
| pelvis | the large, basin-shaped ring of bone at the base of the spine that supports the trunk and protects the lower organs | The pelvis connects the spine to the legs and supports the weight of the upper body. |
| spine | the column of vertebrae running down the back that supports the body and protects the spinal cord | Good posture keeps the spine properly aligned and reduces back pain. |
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Frequently Asked Questions
What is the difference between an artery and a vein?
Both are blood vessels, but they carry blood in opposite directions and serve different roles. An artery carries oxygen-rich blood away from the heart to the tissues, and arteries have thick, muscular walls to withstand the high pressure of each heartbeat. A vein carries oxygen-poor blood back towards the heart, has thinner walls, and contains one-way valves to stop blood flowing backwards. A simple memory aid: arteries carry blood away from the heart. The one major exception is the pulmonary artery, which carries deoxygenated blood from the heart to the lungs.
What is the difference between a tendon and a ligament?
These two words are often confused because both are tough bands of connective tissue, but they connect different things. A tendon connects a muscle to a bone — it transmits the force of a muscle contraction so the bone moves. A ligament connects a bone to another bone — it holds a joint together and keeps it stable. A useful way to remember the difference is that a torn ligament (such as the ACL in the knee) makes a joint unstable, whereas a torn tendon (such as the Achilles) affects movement and strength.
What exactly is cartilage?
Cartilage is a firm but flexible connective tissue found throughout the body. Unlike bone, it has no blood supply of its own, which is why it heals very slowly when damaged. Cartilage does several jobs: it cushions the ends of bones inside joints so they glide smoothly, it gives shape to structures such as the nose and the outer ears, and it forms the flexible rings of the windpipe. When the cartilage in a joint wears away over time, the result is the painful condition known as osteoarthritis.
What is the difference between the thorax and the abdomen?
The thorax and the abdomen are two adjacent regions of the trunk. The thorax — commonly called the chest — is the upper part, enclosed by the rib cage, and it contains the heart and lungs. The abdomen is the region below it, between the chest and the pelvis, and it contains the stomach, intestines, liver, and kidneys. The two cavities are separated by the diaphragm, the muscle used in breathing. In medical English you will often see these regions used to describe where pain or an injury is located.
What is a vertebra and how does it relate to the spine?
A vertebra is one of the small individual bones that stack on top of one another to form the spine (also called the backbone or vertebral column). The plural of vertebra is vertebrae. An adult spine usually has 33 vertebrae, divided into regions: cervical (neck), thoracic (upper back), lumbar (lower back), and the fused sacrum and coccyx. Together these vertebrae support the body, allow it to bend and twist, and protect the spinal cord, the bundle of nerves running down the centre of the spine.
What is the difference between an organ and a tissue?
These terms describe different levels of organisation in the body. A tissue is a group of similar cells working together — for example, muscle tissue or nerve tissue. An organ is a structure made up of several different tissues that work together to perform a specific function, such as the heart, the liver, or the lungs. So tissues are the building blocks, and organs are made from them. Several organs working together form an organ system, such as the digestive system or the circulatory system.
What does the diaphragm do?
The diaphragm is a large, dome-shaped muscle that sits beneath the lungs and separates the thorax from the abdomen. It is the main muscle of breathing. When you breathe in, the diaphragm contracts and flattens, which increases the space in the chest and draws air into the lungs. When you breathe out, it relaxes and returns to its dome shape, pushing air out. Hiccups are caused by sudden, involuntary contractions of the diaphragm, and the diaphragm is also involved in coughing, sneezing, and singing.
What is the difference between the cranium and the skull?
These words are related but not identical. The skull is the entire bony structure of the head, including the lower jaw (the mandible). The cranium is the part of the skull that encloses and protects the brain — in other words, the skull minus the jaw and the facial bones. In everyday English people often use skull for both, but in anatomy and medicine the more precise term cranium refers specifically to the brain case. The bones of the cranium are joined by immovable joints called sutures.
What is bone marrow and why is it important?
Marrow, or bone marrow, is the soft, spongy tissue found inside many bones, especially large ones such as the pelvis and the thigh bone. It is vitally important because it produces the body's blood cells: red blood cells that carry oxygen, white blood cells that fight infection, and platelets that help blood to clot. There are two types — red marrow, which actively makes blood cells, and yellow marrow, which mainly stores fat. Because marrow is so essential, a bone marrow transplant can be a life-saving treatment for diseases such as leukaemia.
What is the best way to learn human anatomy vocabulary?
The most effective method is to learn the words alongside what they actually do, rather than as an isolated list. Use a labelled diagram of the body and connect each term — artery, tendon, vertebra — to its location and function. Learning the common Latin and Greek roots also helps, since many anatomy words share them (for example, cardio- for heart). Use Flash Cards on LexFizz to drill the 20 words on this page, then reinforce them by reading short medical or biology texts in English where the words appear in real context.