The document discusses the four main life processes of nutrition, digestion, respiration, and circulation. It explains that nutrition provides nutrients and energy through four processes: digestion in the stomach and intestines, respiration in the lungs, circulation through the heart and blood vessels, and excretion through the kidneys. It also covers the body's sensitivity through the sense organs, nervous system, and locomotor system.

1. 1. LIFE PROCESSES
UNIT 1. NATURAL SCIENCE. 4TH GRADE

2. NUTRITION
• provides your body with all the nutrients and energy that
are necessary for life.

3. NUTRITION
Involves 4 processes:
• 1. DIGESTION
• 2. RESPIRATION
• 3. CIRCULATION
• 4. EXCRETION

4. DIGESTION
• Takes place in the digestive system
• DIGESTIVE SYSTEM:
• This system absorbs nutrients
you need from food.
• MAIN ORGANS: STOMACH and
INTESTINES.

5. RESPIRATION
• Takes place in the respiratory system
when we breathe in air
• MAIN ORGANS: LUNGS

6. CIRCULATION
•Takes place in the circulatory system
•Moves the blood with oxygen
and nutrients.
•MAIN ORGAN: HEART

7. EXCRETION
• Takes place in the excretory
system.
• FUNCTION: Expels waste
from the body.
• MAIN ORGANS: KIDNEYS

8. SENSITIVITY
• Ability to detect and
respond to changes in the
environment.
• It involves:
1. THE SENSE ORGANS
2. THE NERVOUS SYSTEMS
3. THE LOCOMOTOR
SYSTEMS

9. THE SENSE ORGANS

10. THE NERVOUS SYSTEM
Receives information
from the sense
organs.
1. Carry information
from the sense
organs to the brain
2. Carry orders from the
brain to the locomotor
system

12. THE LOCOMOTOR SYSTEM
• allows us to move our body.

13. • Bones meet at joints.

15. Muscles are
joined to
bones by
tendons.