---
title: Bones show white on an X-ray because the calcium in them stops X-ray… — Cells, bones and muscles · tree and pragmatics
description: Bones show white on an X-ray because the calcium in them stops X-rays more than soft muscle and skin, and a break shows as a dark line; bone cells slowly rebuild a break over several weeks, so a broken arm is kept still in a cast. Who acts: Bones, calcium, break, bone cells. A sentence of the lesson
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/64-cells-bones-and-muscles/11/)

<!-- crumbs -->
[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/) / [Cells, bones and muscles](https://md.mova.elamur.ai/free/en/corpora/school/biology/64-cells-bones-and-muscles/) / 11

# Cells, bones and muscles, sentence 11

<!-- .ven lang=en -->
Bones show white on an X-ray because the calcium in them stops X-rays more than soft muscle and skin, and a break shows as a dark line; bone cells slowly rebuild a break over several weeks, so a broken arm is kept still in a cast.

<!-- .vintro -->
**Who acts:** Bones, calcium, break, bone cells · **What happens:** show, stop, rebuild, break, keep · **To what, where:** white, X ray, X rays, break, broken arm, cast

<!-- .vabout -->
This is a sentence of the lesson «Cells, bones and muscles» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (Bones, calcium, break, bone cells), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:064-cells-bones-and-muscles.lesson:11
# text = Bones show white on an X-ray because the calcium in them stops X-rays more than soft muscle and skin, and a break shows as a dark line; bone cells slowly rebuild a break over several weeks, so a broken arm is kept still in a cast.
# source = school lesson (ours)
# course = biology
# lesson = 064-cells-bones-and-muscles.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×5, R7-rel-agree ×1, R8-pos-agree ×2
1	Bones	bone	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	show	show	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	white	white	ADJ	JJ	Degree=Pos	2	obj	_	Agree=R7-rel-agree|Haiku=2:xcomp
4	on	on	ADP	IN	_	8	case	_	_
5	an	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
6	X	x	NOUN	NN	Number=Sing	8	compound	_	_
7	-	-	PUNCT	HYPH	_	6	punct	_	_
8	ray	ray	NOUN	NN	Number=Sing	2	obl	_	Agree=R5-strong|Haiku=3:obl
9	because	because	SCONJ	IN	_	14	mark	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	calcium	calcium	NOUN	NN	Number=Sing	14	nsubj	_	_
12	in	in	ADP	IN	_	13	case	_	_
13	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	11	nmod	_	_
14	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	Agree=R5-strong|Haiku=3:advcl
15	X	x	NOUN	NN	Number=Sing	17	compound	_	Agree=R8-pos-agree|Haiku=17:compound|HaikuPos=PROPN:NNP:Number=Sing
16	-	-	PUNCT	HYPH	_	15	punct	_	_
17	rays	ray	NOUN	NNS	Number=Plur	14	obj	_	Agree=R5-strong|Haiku=18:nsubj
18	more	more	ADJ	JJR	Degree=Cmp	14	obj	_	_
19	than	than	ADP	IN	_	21	case	_	_
20	soft	soft	ADJ	JJ	Degree=Pos	21	amod	_	_
21	muscle	muscle	NOUN	NN	Number=Sing	18	obl	_	_
22	and	and	CCONJ	CC	_	23	cc	_	_
23	skin	skin	NOUN	NN	Number=Sing	21	conj	_	_
24	,	,	PUNCT	,	_	28	punct	_	_
25	and	and	CCONJ	CC	_	28	cc	_	_
26	a	a	DET	DT	Definite=Ind|PronType=Art	27	det	_	_
27	break	break	NOUN	NN	Number=Sing	28	nsubj	_	_
28	shows	show	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	Agree=R5-strong|Haiku=14:conj
29	as	as	ADP	IN	_	32	case	_	_
30	a	a	DET	DT	Definite=Ind|PronType=Art	32	det	_	_
31	dark	dark	ADJ	JJ	Degree=Pos	32	amod	_	_
32	line	line	NOUN	NN	Number=Sing	28	obl	_	_
33	;	;	PUNCT	,	_	37	punct	_	_
34	bone	bone	NOUN	NN	Number=Sing	35	compound	_	_
35	cells	cell	NOUN	NNS	Number=Plur	37	nsubj	_	_
36	slowly	slowly	ADV	RB	_	37	advmod	_	_
37	rebuild	rebuild	VERB	VB	VerbForm=Inf	28	conj	_	_
38	a	a	DET	DT	Definite=Ind|PronType=Art	39	det	_	_
39	break	break	NOUN	NN	Number=Sing	37	obj	_	_
40	over	over	ADP	IN	_	42	case	_	_
41	several	several	ADJ	JJ	Degree=Pos	42	amod	_	_
42	weeks	week	NOUN	NNS	Number=Plur	37	obl	_	_
43	,	,	PUNCT	,	_	49	punct	_	_
44	so	so	ADV	RB	_	49	advmod	_	_
45	a	a	DET	DT	Definite=Ind|PronType=Art	47	det	_	_
46	broken	break	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	47	amod	_	Agree=R8-pos-agree|Haiku=47:amod|HaikuPos=ADJ:JJ:Degree=Pos
47	arm	arm	NOUN	NN	Number=Sing	49	nsubj:pass	_	_
48	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	49	aux:pass	_	_
49	kept	keep	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	37	advcl	_	_
50	still	still	ADV	RB	_	49	advmod	_	Agree=R5-strong|Haiku=53:advmod
51	in	in	ADP	IN	_	53	case	_	_
52	a	a	DET	DT	Definite=Ind|PronType=Art	53	det	_	_
53	cast	cast	NOUN	NN	Number=Sing	49	obl	_	_
54	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **show** | present | Bones | white |  | a X ray |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V NP.recipient»: agent=Agent white=Recipient |
| 2 | **stop** | present | the calcium in bones | X rays |  |  |  |  | tree rules |
| 3 | **show** | present | a break |  |  |  |  | as a dark line | vn transfer\_mesg-37.1.1-1-1 «NP V»: agent=Agent |
| 4 | **rebuild** | infinitive | bone cells | a break |  |  | week | slowly *property* | vn create-26.4 «NP V NP»: agent=Agent break=Result |
| 5 | **break** | participle |  |  |  |  |  |  | vn hurt-40.8.3-1-1 «NP V»: agent=Patient |
| 6 | **keep** | present · passive |  | a broken arm |  | a cast | still |  | vn keep-15.2 «NP V NP PP.location»: subject=Theme in cast=Location |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- div src -->

**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:biology:064-cells-bones-and-muscles.lesson:11`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×5, R7-rel-agree ×1, R8-pos-agree ×2. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

<!-- /div -->

<!-- pn -->
- ← previous: [Cells, bones and muscles, 10](https://md.mova.elamur.ai/free/en/corpora/school/biology/64-cells-bones-and-muscles/10/)
- next →: [Cells, bones and muscles, 12](https://md.mova.elamur.ai/free/en/corpora/school/biology/64-cells-bones-and-muscles/12/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/64-cells-bones-and-muscles/)

