The document discusses the human body and interaction. It explains that humans have three vital functions: nutrition, interaction, and reproduction. For interaction, humans receive stimuli through their five senses of smell, taste, touch, sight, and hearing. The nervous system then controls the body by sending, receiving, and interpreting this sensory information to produce responses. It consists of the brain, nerves, and spinal cord working with sense organs, sensory nerves, and motor nerves to transmit messages and information throughout the body.

1. UNIT 1
THE HUMAN BODY
AND INTERACTION

2. All living things
carry out three - Nutrition
vital functions - Interaction
- Reproduction
Video: The 3 vital functions

3. Human beings control and coordinate their
activities through the interaction function.
Stimulus-sensation Processing information Response
Video: Stimulus and response

4. Stimulus-sensation Processing Response
information
Types of stimulus
Internal stimulus:
Changes that happen outside our
body. Our sense organs capture
these stimulus and send a message
to the brain. Ex. We hear a noise
External stimulus:
Changes that happen inside our
body. Ex. Our stomach is empty
Types of responses
Motor responses:
When the muscles move. Ex. You
close your eyes
Glandular responses:
The organs called glands produce
a substance. Ex. Sweat glands

5. Human beings receive information from the
environment and from our body through the
five senses:
- Smell - Sight
- Taste - Hearing
- Touch
Video: The five senses

6. The sense of smell

7. The sense of taste

8. The sense of touch

9. The sense of sight

10. The sense of hearing

11. The nervous system
controls our body sending,
receiving and interpreting
information.
It consists of the brain,
the nerves and the spinal
cord.
cerebrum
cerebellum brain stem

12. SENSE ORGANS
They receive the
stimulus and send
impulses to the sensory
nerves.
SENSORY NERVES
They send the
information from the
sense organs to the
central nervous system.
CENTRAL NERVOUS SYSTEM
It receives and interpret the
information and produces
responses.
MOTOR NERVES
They send the information from
the central nervous system to the
muscles.
Messages and information travel through our body.
This is the process:

13. The musculoskeletal system consist of the skeleton, muscles,
tendons and ligaments.