--- title: Muscles and joints by name: biceps, triceps, knees, elbows and the busiest muscles — a lesson of Mova's school · trees and pragmatics description: «Muscles and joints by name: biceps, triceps, knees, elbows and the busiest muscles», a lesson of the biology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Bones cannot move themselves; muscles move them, and a muscle can do only one thing: sh --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / Muscles and joints by name: biceps, tr… # Muscles and joints by name: biceps, triceps, knees, elbows and the busiest muscles Lesson 360 of the biology course of Mova's primary school: 17 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/0/) — Bones cannot move themselves; muscles move them, and a muscle can do only one thing: shorten and pull. - [1](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/1/) — It can never push. - [2](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/2/) — Bend your arm and feel the biceps at the front go hard as it pulls the forearm up; straighten it and the triceps at the back pulls it down again. - [3](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/3/) — Muscles work in pairs like this, one pulling each way. - [4](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/4/) — Where two bones meet there is a joint, and each kind moves differently: the elbow and knee are hinges like a door, the shoulder and hip are balls in sockets, and a pivot at the top of your neck lets you shake your head «no». - [5](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/5/) — Some muscles hardly ever stop: the heart beats about 100,000 times a day, and your eye muscles flick your eyes many tens of thousands of times a day. - [6](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/6/) — The body has over 600 muscles; they move the bones and also work inside organs, and some are tiny while others are very big. - [7](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/7/) — Muscles can only pull, never push, so they work in pairs: the biceps bends the elbow and the triceps straightens it. - [8](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/8/) — The Achilles tendon is the strongest tendon in the body; it joins the calf muscles to the heel bone and is named after the Greek hero Achilles, who in the legend was wounded in the heel. - [9](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/9/) — The knee is a hinge joint held together by strong straps called ligaments, with cushions of cartilage between the bones; knee injuries are common in sport. - [10](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/10/) — Ligaments join bone to bone, while tendons join muscle to bone. - [11](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/11/) — Joints come in kinds: hinge joints in the elbow and knee, ball-and-socket joints in the shoulder and hip, a pivot joint at the top of the neck for shaking the head, and gliding joints between small bones of the wrist. - [12](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/12/) — The eye muscles are among the busiest in the body, moving the eyes quickly and precisely many tens of thousands of times a day. - [13](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/13/) — The heart is a special muscle that beats about 100,000 times a day and never rests for long. - [14](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/14/) — The biggest muscle is the gluteus maximus in the bottom, which helps hold you upright and push you up stairs; the smallest is a tiny muscle in the middle ear that helps protect hearing from loud sounds. - [15](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/15/) — A cramp is a muscle squeezing hard and not letting go; it is common after exercise, and gently stretching the muscle usually helps. - [16](https://md.mova.elamur.ai/free/en/corpora/school/biology/360-muscles-and-joints-by-name-biceps-triceps-knees-elbows-and-the-busiest-muscles/16/) — Muscles grow stronger with use; astronauts in space lose muscle without gravity to work against, so they exercise about two hours a day. - ← previous: [Bones by name: hips, legs and feet, and the extra bones of a baby](https://md.mova.elamur.ai/free/en/corpora/school/biology/359-bones-by-name-hips-legs-and-feet-and-the-extra-bones-of-a-baby/) - next →: [Growing up: growth spurts, height, voices and getting stronger](https://md.mova.elamur.ai/free/en/corpora/school/biology/361-growing-up-growth-spurts-height-voices-and-getting-stronger/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/)