Titulodescriptivo

Páginas: 3 (564 palabras) Publicado: 12 de agosto de 2012
Physiology

The fertilization is internal. They are oviparous; it is to say, they put eggs, in nests that they construct with sticks and branches. Mas this one is alone the top part. The eggs inquestion are buried. Sometimes, the tortoises take advantage of the nests of the crocodiles, which protect his nest and incubate his eggs. They possess in addition a heart formed by four cavities (twoauricles and two ventricles). They are poiquilotermos and ectotermos; it is to say, that his corporal temperature changes with the environmental one. They breathe by means of the lungs. They are theanimals of pulmonary breathing that more time can last under the water; his lungs are so big that it can manage to be six hours under the water if it is in continuous movement; if it is kept still, thatis to say, consuming the minimal quantity of oxygen per minute, it is capable of remaining two days followed under the water. The abdomen and the thorax are separated by a muscular diaphragm thatalso is used in the breathing.
Size: The crocodile could measure up to 5 m of total length (maximum value: 7 m).
I weigh: The crocodile can overcome 1.000 kg.
Distribution: sub-Saharan Africa,including Madagascar and some other islands of the Indian Ocean, as the Comores and the Seychelles.
Habitat: Marshes, swamps, river mouths of rivers and, specially, humid zones of the interior, as slowrivers, lakes, enclosed puddle and temporary pools.
Supply: When the crocodile is young they capture insects; on fish and mollusks having come to adults; and, from 3 m of length, they dare to huntvertebrate of major size. Reproduction: The crocodile puts 15 to 80 eggs (normally from 20 to 50), which incubate during 12 ó 13 weeks. 12 do not reach the sexual maturity up to passed ó 15 years.Relation with the man
The crocodiles can attack the man if they approach too much, the most dangerous is the marine crocodile (Crocodylus porosus), followed by that of the Nile (Crocodylus niloticus)....
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