Recursos educativos vertebrates página 10

Mostrando resultados de 99

Amphibians and reptiles
EduBook Organización
3521 visitas
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…
Ver más
Feeding and digestion in animals
EduBook Organización
3488 visitas
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…
Ver más
Fish
EduBook Organización
3383 visitas
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.…
Ver más
Raising cows and producing milk - Work
EduBook Organización
2839 visitas
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…
Ver más
Mammals
EduBook Organización
2524 visitas
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…
Ver más
Fish
EduBook Organización
2507 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…
Ver más
Analyse. A text
EduBook Organización
2181 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…
Ver más
Reptiles
EduBook Organización
2033 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…
Ver más
Structure of a tapeworm
EduBook Organización
1866 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…
Ver más