1. Living Organisms carry out life processes in order to survive.
The human body is complex.
Cells
Tissues
Organs
Systems

2. Living Organisms carry out life processes in order to survive
Cell = basic unit of life
Tissue = group of similar cells that work together to perform a function
Organ = group of different tissues that work together to carry out a function in the body
System = group of organs that work together to perform a function to meet material and energy requirements

3. Living Organisms carry out life processes in order to survive
The body’s systems interact with one another.
HOMEOSTASIS
The ability of your body to maintain internal conditions.

4. Living Organisms carry out life processes in order to survive
HOMEOSTASIS
Keeps the following balanced….
Body temperature
Amount of blood sugar
Posture (There are other examples.)

5. Living Organisms carry out life processes in order to survive.
The body’s systems interact with one another.
Body Systems
Skeletal Muscular Cardiovascular Respiratory Digestive Nervous Endocrine Urinary Integumentary Reproductive

6. The body’s systems interact with one another.
Skeletal System = interacts with muscles & cardiovascular system
PRODUCES BLOOD
MOVEMENT
Axial Skeleton = skull, rib cage, backbone
Appendicular Skeleton = shoulders, hips, arms, legs
Joints = free moving, immovable, slightly movable

7. The body’s systems interact with one another.
Muscular System = interacts with skeletal and nervous systems
MOVEMENT BODY TEMPERATURE
MOVEMENT POSTURE

8. The body’s systems interact with one another.
Muscular System = interacts with skeletal and nervous systems
Skeletal Muscle = voluntary triceps
rectus abdominus
Smooth Muscle = involuntary
digestive system arteries, veins
Cardiac Muscle = involuntary heart

9. The body’s systems interact with one another.
Muscular System = interacts with skeletal and nervous systems
Skeletal muscles & tendons allow bones to move.
Tendons = strong tissues that attached muscles to bones
As fibers in a muscle contract, they shorten and pull the tendon.
The tendon then pulls the bone.

10. Muscles work with nerves to produce movement.
Muscular System = interacts with skeletal and nervous systems
Muscles work with nerves to produce movement.
Communication between the nerve cells and muscle cells produce muscle contractions.
The communication involves the diffusion of elements in and out of the muscle and nerve cells (active transport)
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