The excretory system.

Organs in the excretory system:

• Kidneys: They clean our blood.

• Ureters: Tubes conneccting the kidneys with the bladder.

• Bladder: Urine is stored in the bladder.

• Urethra: a tube that carries the urine out of the body.

The circulatory system.

The heart and the blood vessels form the circulatory system.

The circulatory system carries blood around our body.

Types of blood vessels.

There are three types of blood vessels:

1. Arteries: they carry blood full of nutrients and oxygen.
2. Capillaries: they are small ones because they get to every part of our body.
3. Veins: they carry blood poor in oxygen and nutrients.
Types of Blood Vessels

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The digestive system.

The digestive system includes: mouth, stomach, oesophagus, small intestine, large intestine, rectum and anus.

The digestion is the main purpose of the digestive system.

Digestion transforms food into the nutrients our body needs to live.

Respiratory system