REPRODUCTION IN ANIMALS

Human beings and animals can be male or female.
Females are the feminine sex.
Males are the masculine sex.
In order to reproduce, the male and female must come together.
This union is called mating.
Human beings and most animals create offspring through sexual reproduction.
Some animals reproduce asexually.
They do not mate.
For example, starfish.

ANIMALS AND THEIR OFFSPRING

After mating, the offspring starts to grow.
In some animals, the offspring grows in an egg outside the mother.
In other animals the offspring grows inside the mother's womb.

• Oviparous: the offspring grows inside an egg, laid by the mother. Examples: birds and insects.
• Viviparous: the offspring grows inside the mother's womb. Examples: humans and other mammals.

THE PROCESS OF REPRODUCTION

Reproduction is the ability of all living things to produce new living things of their own kind.
This is how life continues on Earth.

RABBIT'S SKULL

Here you have two pictures of a rabbit's skull.
Special thanks to Juan Sánchez, who found the skull and brought it to the classroom, so I could take the pictures.

SENSITIVITY IN PLANTS

Plants are different from animals.
They do not have legs to move.
They do not have sense organs.
They do not have a nervous system.
However, they do have sensitivity.

• Plants grow towards light. Light is necessary for photosynthesis.

• Plants roots grow towards water.

• Some plants close their leaves if you touch them.

• Some plants wrap themselves around other plants as they grow.

• Some plants open their flowers during the day.

• Some plants open their flowers at night.

SENSITIVITY IN ANIMALS

People and animals use sense organs, muscles, and the nervous system to respond to the environment.
The most important part of the nervous system is the brain.
The sense organs send information to the brain through the nerves. The brain studies this information and decides what to do.
Then, the brain sends an order to the muscles.

ALL LIVING THINGS HAVE SENSITIVITY

Sensitivity means the ability to respond to changes in the environment.
Your sense organs provide sensitivity.