Recursos educativos vertebrates página 10

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Amphibians and reptiles
EduBook Organización
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Amphibians Amphibians are vertebrates that live part of their lives in fresh water and part on land. Characteristics of amphibians The skin of amphibians is moist and slimy. It has no protective…
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Feeding and digestion in animals
EduBook Organización
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1.1. How do animals feed? Animals are heterotrophic; they need to find food and transform it to get nutrients. These substances provide energy and materials the animal needs to grow, make new tissues…
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Fish
EduBook Organización
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1.1 Characteristics of fish Fish are perfectly adapted to aquatic life. They are the most numerous and diverse group of vertebrates. There are two main groups of fish: bony fish and cartilaginous fish.…
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Raising cows and producing milk - Work
EduBook Organización
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Cows Cows are vertebrates. Their body is covered in fur and they have a large udder, which produces milk. Cows' legs end in two toes. These are covered by a thick nail, called a hoof. How do we…
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Fish
EduBook Organización
2478 visitas
The most primitive group of vertebrates are fish. They are also the most numerous. All fish live in water. Characteristics of fish The body of a fish is elongated and pointed at the ends. It is very…
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Mammals
EduBook Organización
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Characteristics of mammals Mammals are vertebrates with the following characteristics: They are viviparous. This means that the young develop inside the female's body. The female mammal then gives…
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Analyse. A text
EduBook Organización
2140 visitas
Polyembryony Polyembryony is a type of sexual reproduction in which an embryo fragments into several identical embryos. They each develop independently. The young of each litter are of the same sex, as…
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Reptiles
EduBook Organización
1973 visitas
3.1. Reptiles: adapting to the land Reptiles were the first vertebrates to adapt to land and become independent of water. Some examples are lizards, snakes and tortoises. Their main adaptations to life…
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Structure of a tapeworm
EduBook Organización
1827 visitas
Adult tapeworms are intestinal parasites of vertebrates. They have a very simple structure. Tapeworms do not have a respiratory, circulatory or digestive system. Their body is ribbon-shaped, with a head…
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