---
title: Skin is the biggest organ, about 2 square metres on an adult; sunbur… — The human body deeper: bones, muscles and skin · tree and pragmatics
description: Skin is the biggest organ, about 2 square metres on an adult; sunburn damages skin cells, which the body then sheds, and sun cream and a hat protect skin from harmful ultraviolet rays. Who acts: Skin, sunburn, body, sun cream. A sentence of the lesson «The human body deeper: bones, muscles and skin»
---

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# The human body deeper: bones, muscles and skin, sentence 14

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Skin is the biggest organ, about 2 square metres on an adult; sunburn damages skin cells, which the body then sheds, and sun cream and a hat protect skin from harmful ultraviolet rays.

<!-- .vintro -->
**Who acts:** Skin, sunburn, body, sun cream · **What happens:** be, damage, shed, protect · **To what, where:** biggest organ, skin cells, skin

<!-- .vabout -->
This is a sentence of the lesson «The human body deeper: bones, muscles and skin» 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 (Skin, sunburn, body, sun cream), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:263-human-body-deeper-bones-muscles-and-skin.lesson:14
# text = Skin is the biggest organ, about 2 square metres on an adult; sunburn damages skin cells, which the body then sheds, and sun cream and a hat protect skin from harmful ultraviolet rays.
# source = school lesson (ours)
# course = biology
# lesson = 263-human-body-deeper-bones-muscles-and-skin.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): R7-rel-agree ×1, R8-pos-agree ×1
1	Skin	skin	NOUN	NN	Number=Sing	5	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	biggest	big	ADJ	JJS	Degree=Sup	5	amod	_	_
5	organ	organ	NOUN	NN	Number=Sing	0	root	_	_
6	,	,	PUNCT	,	_	10	punct	_	_
7	about	about	ADV	RB	_	8	advmod	_	_
8	2	2	NUM	CD	NumForm=Digit|NumType=Card	10	nummod	_	_
9	square	square	NOUN	NN	Number=Sing	10	compound	_	_
10	metres	metre	NOUN	NNS	Number=Plur	5	appos	_	Agree=R7-rel-agree|Haiku=5:conj
11	on	on	ADP	IN	_	13	case	_	_
12	an	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	adult	adult	NOUN	NN	Number=Sing	10	nmod	_	_
14	;	;	PUNCT	:	_	15	punct	_	_
15	sunburn	sunburn	NOUN	NN	Number=Sing	16	nsubj	_	_
16	damages	damage	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	parataxis	_	_
17	skin	skin	NOUN	NN	Number=Sing	18	compound	_	_
18	cells	cell	NOUN	NNS	Number=Plur	16	obj	_	_
19	,	,	PUNCT	,	_	24	punct	_	_
20	which	which	PRON	WDT	PronType=Rel	24	obj	_	_
21	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
22	body	body	NOUN	NN	Number=Sing	24	nsubj	_	_
23	then	then	ADV	RB	_	24	advmod	_	_
24	sheds	shed	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	18	acl:relcl	_	_
25	,	,	PUNCT	,	_	32	punct	_	_
26	and	and	CCONJ	CC	_	32	cc	_	_
27	sun	sun	NOUN	NN	Number=Sing	28	compound	_	_
28	cream	cream	NOUN	NN	Number=Sing	32	nsubj	_	_
29	and	and	CCONJ	CC	_	31	cc	_	_
30	a	a	DET	DT	Definite=Ind|PronType=Art	31	det	_	_
31	hat	hat	NOUN	NN	Number=Sing	28	conj	_	_
32	protect	protect	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	16	conj	_	Agree=R8-pos-agree|Haiku=16:conj|HaikuPos=VERB:VB:VerbForm=Inf
33	skin	skin	NOUN	NN	Number=Sing	32	obj	_	_
34	from	from	ADP	IN	_	37	case	_	_
35	harmful	harmful	ADJ	JJ	Degree=Pos	37	amod	_	_
36	ultraviolet	ultraviolet	NOUN	NN	Number=Sing	37	compound	_	_
37	rays	ray	NOUN	NNS	Number=Plur	32	obl	_	_
38	.	.	PUNCT	.	_	5	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 | **is a** | present | Skin | the biggest organ |  |  |  |  | tree rules |
| 2 | **damage** | present | sunburn | skin cells |  |  |  |  | vn destroy-44 «NP V NP»: agent=Agent cell=Patient |
| 3 | **shed** | present | the body | skin cells |  |  | then |  | vn substance\_emission-43.4-1 «PP.location V NP»: agent=Location which=Source |
| 4 | **protect** | present | sun cream and a hat | skin |  |  |  | from harmful ultraviolet rays | vn defend-72.3 «NP V NP PP.theme»: agent=Agent skin=Beneficiary from ray=Theme |

<!-- .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.

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**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:263-human-body-deeper-bones-muscles-and-skin.lesson:14`.

**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): R7-rel-agree ×1, R8-pos-agree ×1. **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/).

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