👂👃👄 Unit 1: The human body 👅💪💀
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This unit explains how our body works. It introduces some organs and the body systems they belong to. It explains how our sense organs work and how we control movement.
1.) Nutrition
The process of obtaining energy from food.
There are four body systems involved in nutrition.
a) Digestive system.
b) Circulatory system.
c.) Respiratory system.
d.) Excretory system.
2.) Body systems.
a.) Reproductive system:
The female reproductive organs are: vagina and ovaries.
The male reproductive organs are: penis and testicles.
b.) Nervous system:
With the five senses, it recognises and respond to what is happening around us. It is made up of the brain, the spinal cord and the nerves.
-The brain controls everything. It receives messages from the five senses and gives instructions.
-The nerves are connected to the brain by the spinal cord. They carry messages to the brain and instructions from the brain to our body.
c.) Locomotor system:
It makes our body move. It is made up of bones, joints and muscles.
- Bones (skeleton) they support the body and protect the heart, lungs and brain.
- Muscles work together with the bones to move the body.
3.) The five senses.
Human beings have five senses that help them interact with the world: touch, taste, sight, smell and hearing. Each sense has an organ.
The organ of touch is the skin. We use our skin to identify hot or cold, hard or soft, smooth or rough. Our body is covered with skin. It’s the largest organ in the body.
ü The organ of taste is the tongue. We use our tongue to identify different flavours.
The organs of sight are the eyes. We use our eyes to identify colour, shape, size and distance.
The organ of smell is the nose, we use our nose to identify different smells.
The organ of hearing are the ears. We use our ears to identify loud and quiet sounds.
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