biology

Ultimopharyngeal body

Ultimopharyngeal 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 Ultimopharyngeal body rather than just read about it. In short: The ultimopharyngeal body, or ultimobranchial body or ultimobranchial gland is a small organ found in the neck region of many animals. In humans, it develops from the fourth pharyngeal pouch into the parafollicular cells of the thyroid to produce calcitonin.

Key takeaways

Ultimopharyngeal 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 Ultimopharyngeal body to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ultimopharyngeal body from memory before moving on to harder problems.

Reference excerpt

The ultimopharyngeal body, or ultimobranchial body or ultimobranchial gland is a small organ found in the neck region of many animals. In humans, it develops from the fourth pharyngeal pouch into the parafollicular cells of the thyroid to produce calcitonin. It may not develop in DiGeorge syndrome.

Structure The ultimopharyngeal body is a small organ of the neck. It is found in many animals. In humans, it develops into other tissues.

Development In humans, the ultimopharyngeal body is an embryological structure, and is a derivative of the ventral recess of the fourth pharyngeal pouch. It is technically from the fifth pharyngeal pouch, but this is rudimentary and merges with the fourth. It develops into the parafollicular cells of the thyroid. The cells that give rise to the parafollicular cells are derivatives of endoderm. Endoderm cells migrate and associate with the ultimopharyngeal body during development.

Function In humans, the ultimopharyngeal body develops into the parafollicular cells of the thyroid. These secrete calcitonin. In other animals, the ultimopharyngeal body may produce calcitonin.

Clinical significance The ultimopharyngeal body may not develop in DiGeorge syndrome.

History The ultimopharyngeal body may also be known as the ultimobranchial body or the ultimobranchial gland.

References

External links ent/534 at eMedicine hednk-022—Embryo Images at University of North Carolina

Worked examples

Example 1 — a first encounter with Ultimopharyngeal body

Start with the simplest possible case. Write down what Ultimopharyngeal 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 Ultimopharyngeal 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 Ultimopharyngeal 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 Ultimopharyngeal body

In research: Ultimopharyngeal 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 Ultimopharyngeal 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: Ultimopharyngeal body is common in secondary-school and first-year university syllabi. It links to neighbouring topics Embryology, Endocrine system anatomy, Human head and neck, so understanding it makes those chapters shorter.
In everyday life: Look for Ultimopharyngeal 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 Ultimopharyngeal body in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ultimopharyngeal 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 Ultimopharyngeal body out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ultimopharyngeal body in simple terms?

Why does Ultimopharyngeal 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 Ultimopharyngeal 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 Ultimopharyngeal body.