AMOCTOBSO & SYSTEMS
pg. 264 - 267
AMOCTOBSO

Animals are made up of specialized cells working
together as systems
Cells
Tissues
Organs
Body systems
Organism
AMOCTOBSO

Systems of systems make up whole organisms...
Organelles
Atoms
Molecules
Body/Organ Systems
Cells
Organs
Tissues
Organism
Connections among body systems

Organ systems that coordinate communication
Nervous system
1.

detects and responds
to ex/internal stimuli
Endocrine system
2.

secretes hormones
which affect
development and
reproduction
Connections among body systems

Organ systems that support and move the body
Skeletal system
3.

protects organs and
supports tissues
Muscular system
4.

necessary for
movement
Connections among body systems

Organ systems that protect the body
Urinary system
5.

excretes waste & keeps blood pressure balanced
Connections among body systems

Organ systems that protect the body
Integumentary system
6.

physical barriers for protection
Connections among body systems

Organ systems that protect the body
Immune system
7.

protects from infection
Connections among body systems

Organ system that procreates
Reproductive system
8.

makes subsequent generations
The Big 3...

Organ systems that acquire energy
9.
Respiratory system

10.
Circulatory system

11.
exchanges O2 and CO2
Transports substances
Digestive system

breaks down food
Homeostasis


The body MUST maintain a
stable internal state
We call this process
“homeostasis”
This example shows how negative feedback
regulates room temperature.
In negative feedback, sensors detect a change and
relay this to a control centre, which reverses the
change and restores balance.
Body Worlds...