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Prison cell

Prison cell 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 Prison cell rather than just read about it. In short: A prison cell (also known as a jail cell) is a small room in a prison or police station where a prisoner is held. Cells greatly vary by their furnishings, hygienic services, and cleanliness, both across countries and based on the level of punishment to which the prisoner being held has been sentenced.

Prison cell — main illustration
Prison cell — illustration

Key takeaways

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

Reference excerpt

A prison cell (also known as a jail cell) is a small room in a prison or police station where a prisoner is held. Cells greatly vary by their furnishings, hygienic services, and cleanliness, both across countries and based on the level of punishment to which the prisoner being held has been sentenced. Cells can be occupied by one or multiple prisoners depending on factors that include, but are not limited to, inmate population, facility size, resources, or inmate behavior.

Description The International Committee of the Red Cross recommends that cells be at least 5.4 m2 (58 sq ft) in size for a single cell accommodation (one person in the cell). However, in shared or dormitory accommodations, it recommends a minimum of 3.4 m2 (37 sq ft) per person, including in cells where bunk beds are used.

Prison cells vary in size internationally from 2 m2 (22 sq ft) in Guinea, 3 m2 (32 sq ft) in Poland, 9 m2 (97 sq ft) in Germany to 10 m2 (110 sq ft) in Norway and 12 m2 (130 sq ft) in Switzerland. Council of Europe (Strasbourg, 15 December 2015) call for a minimum standard for personal living space in prison establishments is 6 m2 of living space for a single-occupancy cell or 4 m2 (43 sq ft) of living space per prisoner in a multiple-occupancy cell for the prevention of torture and inhuman treatment. A March 1991 federal government study of U.S. prisons reported that:

"Until recently, the Federal Bureau of Prisons based its determination of rated capacity in existing facilities on a single-bunking standard, which currently calls for providing each inmate with at least 35 square feet of unencumbered space in a single cell. This essentially translates to a cell size of roughly 65 sq ft (6.0 m2).*

*(65 sq ft (6.0 m2), minus 35 sq ft (3.3 m2) of "unencumbered space" leaves 30 sq ft (2.8 m2) of "encumbered" space, which would likely contain bed, toilet and sink - for a single inmate in a single cell) "In practice, however, BOP has accommodated inmate population increases by double-bunking inmates in virtually all its facilities and in cells... of varying sizes, but generally in the 50 to 70 square foot range."

In the United States old prison cells are usually about 6 by 8 feet (1.8 by 2.4 m) in dimension which is 48 sq ft (4.5 m2), (moreover, however, American Correctional Association standards call for a minimum of 70 sq ft (6.5 m2), with steel or brick walls and one solid or barred door that locks from the outside. Many modern prison cells are pre-cast. Solid doors typically have a window that allows the prisoner to be observed from the outside. Furnishings and fixtures inside the cell are constructed so that they cannot be easily broken, and are anchored to the walls or floor. Stainless steel lavatories and commodes are also used. This prevents vandalism or the making of weapons. There are a number of prison and prison cell configurations, from simple police-station holding cells to massive cell blocks in larger correctional facilities. The practice of assigning only one inmate to each cell in a prison is called single-celling or "single-bunking" (as in "bunk bed"). The practice of putting two persons to a cell is referred to as "double-bunking." In many countries, the cells are dirty and have very few facilities. Other countries may house many offenders in prisons, making the cells crowded.

Prison cells in the UK

In the United Kingdom, cells in a police station are the responsibility of the custody sergeant, who also logs each detainee and allocates him or her an available cell. Custody sergeants also ensure cells are clean and as germ-free as possible, in accordance with the Human Rights Act of 1998.

Prison cells in the US

In the United States, the standard cell is equipped with either a ledge or a steel bedstead that holds a mattress. A one-piece sink/toilet constructed of welded, putatively stainless steel is also provided. Bars typify older jails, while newer ones have doors that typically feature a small safety glass window and, often, a metal flap that can be opened to serve meals. A limited number of prisons in Southern California offer upgrades. Costing around $100 a night, these cells are considered cleaner and quieter, and some of them offer extra facilities and\or privileges.

High-security cells

Often, different standards for cells exist in a single country and even in a single jail. Some of those cells are reserved for "isolation", where a convict is kept alone in a cell as punishment method. Some isolation cells contain no furnishing and no services at all.

References

External links

Celebrity Justice: Prison Lifestyles of the Rich and Famous, Matt Clarke (Article on pay-to-stay prison facilities) 91111 Now

Illustrations

Prison cell: Old prison cells near Mootwingee County, NSW. 1976
Old prison cells near Mootwingee County, NSW. 1976
Prison cell: A contemporary prison cell in Germany
A contemporary prison cell in Germany
Prison cell: 19th century prison cell in Pawiak, Warsaw
19th century prison cell in Pawiak, Warsaw
Prison cell: A typical cell in a Swedish prison in 2025, at the wall to the toilet the inmates each have a TV.
A typical cell in a Swedish prison in 2025, at the wall to the toilet the inmates each have a TV.
Prison cell: Police cells in Birmingham, England
Police cells in Birmingham, England

Worked examples

Example 1 — a first encounter with Prison cell

Start with the simplest possible case. Write down what Prison cell 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 Prison cell 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 Prison cell 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 Prison cell

In research
Prison cell 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 Prison cell 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
Prison cell is common in secondary-school and first-year university syllabi. It links to neighbouring topics Law enforcement, Penal imprisonment, Penology, so understanding it makes those chapters shorter.
In everyday life
Look for Prison cell 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 Prison cell in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Prison cell means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Prison cell out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Prison cell in simple terms?

A prison cell (also known as a jail cell) is a small room in a prison or police station where a prisoner is held. Cells greatly vary by their furnishings, hygienic services, and cleanliness, both across countries and based on the level of punishment to which the prisoner being held has been sentenc…

Why does Prison cell 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 Prison cell?

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 Prison cell.

Tags

  • Law enforcement
  • Penal imprisonment
  • Penology
  • Rooms

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