7.1. VERTEBRATE ANIMALS

General characteristics of vertebrates:

1. Internal skeleton made of bones. The main axis is the spinal column.
2. Bilateral symmetry.
3. Body: head, trunk and tail; articulated limbs.
4. Nervous system: brain, spinal cord and nerves.
5. Sexual reproduction.
6. Five classes: mammals, birds, reptiles, amphibians and fish.

MAMMALS
Habitat: terrestrial (most of them) Carnivores, herbivores and omnivores Many glands: sweat, sebaceous and mammary Skin: hair or fur Four limbs Lips and teeth External ears Homeothermic

BIRDS
Habitat: terrestrial Carnivores and/or herbivores Fusiform body shape Skin: feathers Four limbs, beak and wings Light skeletons Homeothermic Oviparous

REPTILES
Habitat: terrestrial Carnivores (testudines: herbivores) Skin: hard scales (testudines: carapace) Four limbs (except ophidia) Poikilothermic Oviparous

AMPHIBIANS
Habitat: terrestrial (wet) Carnivores Skin with no covering Four limbs or legs Poikilothermic Oviparous

YouTube: National Geographic "Amphibians face mass extinction"

YouTube: National Geographic "See a Salamander Grow From a Sigle Cell in this Incredible Time-lapse"

FISH
Habitat: aquatic (gills to breath) Carnivores and/or herbivores Fusiform body shape; fins to swim Lateral line (detects vibrations) Poikilothermic Oviparous

YouTube: National Geographic "Tiny fish use bacteria"

PRÁCTICA DE LABORATORIO Nº 10: Disección de un pez óseo.

YouTube: National Geographic "See a Meat-eating hare caught in the act"

YouTube: WillDiv lista de reproducción Animales Fantásticos