Body systems

All living organisms need 4 things in

order to live

•Energy (plants, meat, sunlight)

•Energy (plants, meat, sunlight)

•Water

•Energy (plants, meat, sunlight)

•Water•Gases (Oxygen, O2 ; Carbon dioxide, CO2)

•Energy (plants, meat, sunlight)

•Water•Gases (Oxygen, O2 ; Carbon dioxide, CO2)

•Waste removal

Body Systems

Body Systems• Skeletal system - the bones

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

• Excretory system - cleans the blood

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

• Excretory system - cleans the blood

• Circulatory system - blood flow

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

• Excretory system - cleans the blood

• Circulatory system - blood flow

• Digestive system - food processing

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

• Excretory system - cleans the blood

• Circulatory system - blood flow

• Digestive system - food processing

• Liver - filters blood and helps digestion

Body Systems• Skeletal system - the bones

• Nervous system - the brain (wiring)

• Excretory system - cleans the blood

• Circulatory system - blood flow

• Digestive system - food processing

• Liver - filters blood and helps digestion

• Respiratory system - breathing

Skeletal system The bones

Skeletal systemSkull

Skeletal systemSpine

Spinal column

Backbone

Vertebrae

Skeletal system Rib cage

• ribs

• sternum

spine

Nervous system

• Brain

• Spinal cord

Nervous system

Brain

Spinal

cord

brain

Spine (close up showing spinal cord)

Excretory systemcleans the blood, expels waste through the urine

Excretory system

• 2 kidneys

• 2 ureters (urine tubes)

• 1 bladder

Cleans the blood, waste exits through urine

Circulatory system

• Heart• Blood vessels arteries (take blood away from heart)

veins (bring blood toward heart)

capillaries (connect arteries to veins)

Circulatory system

heart

• Breathing• collects oxygen (O2)

• releases carbon dioxide (CO2)

Respiratory systemRespiratory system

• 1 trachea

• 2 lungs

Respiratory system

The circulatory and respiratory systems work together. The

blood that returns to the heart

through the veins is depleted of

oxygen. First it is pumped

to the lungs.

Small sacs with thin walls allow gases to be transferred from the blood

Oxygen is taken in from the air as carbon dioxide is released

Fresh (oxygenated) blood returns to the heart to be pumped back out to the body

through the arteries.

Digestive system• esophagus• stomach• small intestine• large intestine (colon)• rectum

Digestive system• esophagus

• stomach

• small intestine

• large intestine (colon)

• rectum

• esophagus

• stomach

• small intestine

• large intestine (colon)

• rectum

Digestive system

liverFilters the blood and aids digestion

Skeletal systemThe bones

• Skull

• Spine• Rib cage ribs; sternum