Structures
What body system contains the heart, veins, and arteries?
Cardiovascular System
What is the main structural unit of the muscular system?
Muscle fibers
What body system breaks down food into substances that cells can absorb?
Digestive System
What body system brings oxygen into the body and removes carbon dioxide?
Respiratory System
How many bones does the adult body have?
206
Name 6 structures in the digestive system
mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, liver, gallbladder, and pancreas
Name 4 structures of the skeletal system
bones, cartilage, ligaments, and tendons
What body system fights bacteria and viruses?
Immune System
What body system provides structure and support to the body?
Skeletal System
How long is the small intestine?
About 22 feet long (3.5 times your height)
Name 2 structures in the immune system
white blood cells, lymph nodes, thymus, bones,
Name 3 structures of the urinary system
Kidneys, Ureters, and Bladder
What body system works with the skeletal and nervous systems to provide movement?
Muscular System
What body system receives stimuli from the outside, and sends signals to the body to respond to stimuli and maintain homeostasis?
Nervous System
What percent of the human body is made of water?
70%
Name 3 structures of the nervous system
brain, spinal cord, and nerves
Name 5 structures of the respiratory system
lungs, airways (nose, mouth, trachea), and diaphragm
What body system delivers oxygen and nutrients throughout the body and picks up waste?
Circulatory System
What body system disposes of waste and controls body fluid levels?
Urinary System
About how many times per minute does a person blink?
about 20
Name 3 structures of the integumentary system
hair, skin, nails
Name 4 glands and 4 hormones (tell what they do) in the endocrine system
What body system provides a barrier to keep out dangerous particles and hold in water?
Integumentary system
What body system regulates the body through chemical messages called hormones and helps maintain homeostasis?
Endocrine System
How many bones are humans born with?
about 300