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L’ORCAL’ORCAMaria
Gemma
Marc
Àlex
Laura
Miquel
Maria
Gemma
Marc
Àlex
Laura
Miquel
COM ÉS PERCOM ÉS PER
FORAFORA

Les orques són cetacis que viuen al mar. Pertanyen a la
família dels dofins.

L’orca pot arribar fins a 8 metres.

Poden pesar fins a 5000 kg.

Les seves parts més importants són: cos, les aletes
pectorals, la dorsal i la caudal.

També tenen un espiracle per respirar.

Una boca molt gran i forta amb unes 50 dents
aproximadament.
COM ÉS PERCOM ÉS PER
DINSDINS

L’orca té esquelet.

Si mires un esquelet d’orca en vertical veurem com
un esquelet humà.

Tenen sang calenta.

Tenen pulmons.

Han de sortir a fora de l’aigua per respirar.
L’ORCA PER DINSL’ORCA PER DINS
Columna vertebral
aletes
crani
L’ORCA PER DINSL’ORCA PER DINS
Pulmons estomac
cervell
cor
fetge
intestins
Ronyó
REPRODUCCIREPRODUCCI
ÓÓ

Les femelles maduren als 6 - 10 anys, els
mascles entre els 10-13 anys.

L’embaràs dura de 15 a 18 mesos.

Els parts es produeixen durant tot l’any amb
més freqüència durant l’hivern.

Les cries mengen llet de les mares durant dos
anys.
ALIMENTACIÓALIMENTACIÓ

Són carnívors.

Mengen taurons, tortugues de mar,
sardines, salmons, lleons marins i
morses.

Per caçar es camuflen amb l’aigua.
 Viuen a oceans molt diferents: des del mar
Tropical fins a l’oceà Antàrtic.
 Estan a alta mar i en tots els oceans.
•
Les femelles viuen de 50 a 60 anys.
•
Els mascles viuen 30 anys.
• L’orca no té depredadors i es troba
al cim de la cadena alimentària.
• Van en grups (manades) on la femella
és la dominant.
• Es comuniquen amb sons aguts i
xiulets.
Les principals diferències són:
•Tamany: el mascle és més gran.
•El pes: el mascle pesa més.
•Els òrgans genitals.
CONCLUSIONSCONCLUSIONS
 Té esquelet: VERTEBRAT
 Respira per PULMONS
 Menja altres animals. És CARNÍVOR
 Neix de la panxa de la mare. És VIVÍPAR
 Viu al mar.
 És un MAMÍFER MARÍ

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