Body Organization
The smallest unit of life in the human body
Cells
The main organ in the cardiovascular system
heart
The main organ in the digestive system
Stomach
The main function of the excretory system
To remove waste
The main organ in the muscular system
Muscles
Multiple cells of the same type attached to one another
Tissue
The nervous system's main function is to...
send messages to other parts of the body
The main organ in the endocrine system
Glands
DAILY DOUBLE: The organ in the excretory system that removes waste by sweating
Skin
The main organ in the skeletal system
Bones
Multiple tissues formed together
Organ
DAILY DOUBLE: The cardiovascular system circulates this substance throughout the human body
blood
Glands in the endocrine system produce these chemicals into the bloodstream
Hormones
The three organs that make up the integumentary system
hair, skin, and nails
The number of bones in the human body
206
Several organs working together to complete a function
Organ system
The three organs that make up the nervous system
brain, nerves, spinal cord
The endocrine system releases this hormone when you are in danger or scared
Adrenaline
The organ in the excretory system that removes waste by releasing carbon dioxide
Lungs
The main function of the skeletal system
To provide support and protect internal organs
All of the organ systems working together form the...
human body
The cardiovascular system can also be called....
circulatory system
The first stage of digestion
Ingestion
The organ in the excretory system that removes waste by filtering blood
Kidneys
The number of muscles in the human body
Over 600