Topography and morphometry of timo in fowl (<i>Gallus domesticus</i>) from Ross 308 AP LINEAGE (AP95)

Freitas, Adriana Garcia de; Pereira, Cheston Cesar Honorato; Calábria, Kênia Cristina; Silva, Marina Carla Bezerra da; Silva, Frederico Ozanam Carneiro e

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Ciência Animal Brasileira

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Medicina Veterinária • Ciênc. anim. bras. 21 • 2020 • https://doi.org/10.1590/1809-6891v21e-50566 copy

Topography and morphometry of timo in fowl (Gallus domesticus) from Ross 308 AP LINEAGE (AP95)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this study was to describe the topography and morphometry of the thymus in 30 domestic fowl of the Ross 308 AP (AP95) lineage, 15 males and 15 females, with an approximate age of 15 weeks and a mean weight of 2.1 kg for males and 1.7 for females. After fixation in 10 % formalin aqueous solution, the specimens were dissected. The thymic lobes were located from the cranial third of neck to clavicular bones, linearly, longitudinally and laterally in neck, parallel to the vagus nerve, external jugular vein and common vagus nerve artery. The lobes presented oval and triangular shapes and the number varies from four to eight. Grouping the thymic lobes according to the location in neck in cranial, middle or caudal thirds, the averages of length x widths x thickness varied from 1.93 to 52.1 mm, 0.98 to 23.15 mm and 0.32 to 8.52 mm. The thymus of AP95 chicken presented topographic and morphological characteristics similar to those of other strains, but, regarding morphometry, unique characteristics were observed.

Keywords:
anatomy; glands; chicken; primary lymphoid organ; lymphoid tissue

Sexo	Comprimento		P-valor
Sexo	x̅	s	P-valor
Machos	13,87 cm ^{A (*)}	±1,36	0,93
Fêmeas	13,77 cm ^A	±1,32	0,93

Região cervical	Machos		Fêmeas
	Nº de aves (%)		Nº de aves (%)
	AD	AE	AD	AE
Cranial	3^a(*) (20%)	4^a (26,66%)	2^a (13,33%)	3^a (20%)
Média	15^b (100%)	15^b (100%)	15^b (100%)	15^b (100%)
Caudal	14^b (93,33%)	15^b (100%)	15^b (100%)	15^b (100%)

Nº de lobos	Fêmeas		Machos
	Nº de aves (%)		Nº de aves (%)
	AD	AE	AD	AE
Quatro	8^a(*) (53,33%)	6^a (40%)	2^b (13,33%)	3^ab (20%)
Cinco	3^ab (20%)	5^a (33,33%)	8^a (53,33%)	6^b (40%)
Seis	2^b (13,33%)	1^b (6,66%)	3^ab (20%)	5^ab (33,33%)
Sete	2^b (13,33%)	2^ab (13,33%)	2^b (13,33%)	1^a (6,66%)
Oito	-	1^b (6,66%)	-	-

Região cervical	Fêmeas				Machos
	AD		AE		AD		AE
	x̅	s	x̅	s	x̅	S	x̅	s
Cranial	0,27^Aa(*)	±0,70	0,33^Aa	±0,72	0,20^Aa	±0,41	0,33^Aa	±0,62
Média	3,27^Aa	±0,88	3,40^Aa	±0,63	3,60^Aa	±0,98	2,93^Ab	±0,70
Caudal	1,47^Aa	±0,92	1,40^Aa	±0,51	1,60^Aa	±0,63	1,87^Aa	±0,64
x̅ Total	4,87 ^Aa	±1,12	5,13 ^Aa	±1,30	5,47^Aa	±1,06	5,13^Aa	±0,92

Região cervical	x̅ C (mm) (s)		x̅ L (mm) (s)		x̅ E (mm) (s)
Região cervical	F	M	F	M	F	M
Cranial	2,69^a(*)	1,93^a	1,40^a	0,98^a	0,55^a	0,32^a
Cranial	(±7,32)	(±4,43)	(±3,76)	(±2,18)	(±1,45)	(±0,68)
Média	33,38^a	46,92^a	16,87^a	23,15^a	7,25^a	8,52^a
Média	(±13,35)	(±12,99)	(±5,24)	(±7,36)	(±2,80)	(±2,40)
Caudal	38,63^a	34,48^a	8,89^a	12,42^b	2,73^a	4,27^b
Caudal	(±8,37)	(±18,82)	(±5,52)	(±5,14)	(±1,71)	(±2,04)

Região cervical	x̅ C (mm) (s)		x̅ L (mm) (s)		x̅ E (mm) (s)
Região cervical	F	M	F	M	F	M
Cranial	3,75^a(*)	4,87^a	2,09^a	2,49^a	0,48^a	0,52^a
Cranial	(±7,87)	(±9,50)	(±4,62)	(±4,55)	(±1,07)	(±1,02)
Média	52,10^a	45,92^a	21,49^a	22,33^a	6,70^a	7,80^a
Média	(±40,30)	(±17,09)	(±5,86)	(±7,03)	(±2,05)	(±4,09)
Caudal	40,77^a	50,27^b	8,22^a	12,66^b	2,82^a	4,87^b
Caudal	(±6,36)	(±13,97)	(±4,18)	(±4,08)	(±2,00)	(±2,14)

Região cervical	x̅ C (mm) (s)		x̅ L (mm) (s)		x̅ E (mm) (s)
Região cervical	AD	AE	AD	AE	AD	AE
Cranial	2,69^a(*)	3,75^a	1,40^a	2,09^a	0,55^a	0,48^b
Cranial	(±7,32)	(±7,87)	(±3,76)	(±4,62)	(±1,45)	(±1,07)
Média	33,38^a	52,10^a	16,87^a	21,49^b	7,25^a	6,70^a
Média	(±13,35)	(±40,30)	(±5,24)	(±5,86)	(±2,80)	(±2,05)
Caudal	38,63^a	40,77^a	8,89^a	8,22^a	2,73^a	2,82^a
Caudal	(±8,37)	(±6,36)	(±5,52)	(±4,18)	(±1,71)	(±2,00)

Região cervical	x̅ C (mm) (s)		x̅ L (mm) (s)		x̅ E (mm) (s)
Região cervical	AD	AE	AD	AE	AD	AE
Cranial	1,93^a(*)	4,87^a	0,98^a	2,49^a	0,32^a	0,52^a
Cranial	(±4,43)	(±9,50)	(±2,18)	(±4,55)	(±0,68)	(±1,02)
Média	46,92^a	45,92^a	23,15^a	22,33^a	8,52^a	7,80^a
Média	(±12,99)	(±17,09)	(±7,36)	(±7,03)	(±2,40)	(±4,09)
Caudal	34,48^a	50,27^b	12,42^a	12,66^a	4,27^a	4,87^a
Caudal	(±18,82)	(±13,97)	(±5,14)	(±4,08)	(±2,04)	(±2,14)

Universidade Federal de Goiás Universidade Federal de Goiás, Escola de Veterinária e Zootecnia, Campus II, Caixa Postal 131, CEP: 74001-970, Tel.: (55 62) 3521-1568, Fax: (55 62) 3521-1566 - Goiânia - GO - Brazil
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[1] *Correspondente - adrianagarcia@iftm.edu.br