organ systems

Coordinated tissue groups

Organ systems are groups of organs that work together to perform major bodily functions.

The digestive system breaks down food; the circulatory system moves blood; the nervous system transmits signals.

Humans have about eleven organ systems, though the exact count varies by how anatomists draw boundaries between them.

The respiratory and cardiovascular systems work closely together.

Related

lymphatic · excretory · waste removal · homeostasis · immune · fight or flight · respiratory · muscular · reproductive · nervous tissue · kidneys · urinary · digestive · lungs · morphology · skeletal · thermoregulation · heart rate

Categories
Opposites
biological organization level

organ systemscells

Basic biological units

tissues · molecules · organelles · atoms · whole organism

Family

system, organ, organic, organs, disorganized, reorganize, organism, reorganization, reorganized

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Rated G