biology

List of flexors of the human body

List of flexors of the human body is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of flexors of the human body rather than just read about it. In short: In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder, thus decreasing the angle between the upper arm and the forearm.

Key takeaways

List of flexors of the human body belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of flexors of the human body to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of flexors of the human body from memory before moving on to harder problems.

Reference excerpt

In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder, thus decreasing the angle between the upper arm and the forearm.

Flexors

Upper limb of the humerus bone (the bone in the upper arm) at the shoulder Pectoralis major Anterior deltoid Coracobrachialis Biceps brachii of the forearm at the elbow Brachialis Brachioradialis Biceps brachii of carpus (the carpal bones) at the wrist flexor carpi radialis flexor carpi ulnaris palmaris longus of the hand flexor pollicis longus muscle flexor pollicis brevis muscle flexor digitorum profundus muscle flexor digitorum superficialis muscle

Lower limb

Hip

The hip flexors are (in descending order of importance to the action of flexing the hip joint):

Collectively known as the iliopsoas or inner hip muscles: Psoas major Iliacus muscle Anterior compartment of thigh Rectus femoris (part of the quadriceps muscle group) Sartorius One of the gluteal muscles: Tensor fasciae latae Medial compartment of thigh Pectineus Adductor longus Adductor brevis Gracilis Without the iliopsoas muscles, flexion in sitting position is not possible across the horizontal plane.

Thigh of thigh at knee (L5-S2) Biceps femoris Semitendinosus Semimembranosus Gracilis Sartorius Gastrocnemius Popliteus Plantaris (negligible) of toes Posterior compartment of leg Flexor hallucis longus Flexor digitorum longus Flexor digitorum brevis Quadratus plantae Flexor hallucis brevis Flexor digiti minimi brevis of proximal phalanges at metatarsophalangeal joint Lumbrical muscle (foot) Plantar interossei Dorsal interossei

Other torso/lumbar vertebrae Rectus abdominis muscle neck at atlanto-occipital joint Longus capitis muscle Longus colli muscle

Illustrations

Worked examples

Example 1 — a first encounter with List of flexors of the human body

Start with the simplest possible case. Write down what List of flexors of the human body claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of flexors of the human body before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of flexors of the human body ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of flexors of the human body

In research: List of flexors of the human body appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of flexors of the human body in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of flexors of the human body is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anatomical terms of motion, so understanding it makes those chapters shorter.
In everyday life: Look for List of flexors of the human body outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of flexors of the human body in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of flexors of the human body means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of flexors of the human body out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of flexors of the human body in simple terms?

Why does List of flexors of the human body matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of flexors of the human body?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of flexors of the human body.