Human Body Systems I
This system transports oxygen, nutrients, hormones, and waste throughout the body using blood.
Circulatory System
This system breaks down food into nutrients that the body can absorb and use.
Digestive System
This organ pumps blood throughout the body.
Heart
This is the smallest unit of life that can perform all the functions necessary for life.
A Cell
These chemical messengers, produced by the endocrine system, help regulate functions such as growth.
Hormones
These structures inside cells perform specialized functions.
Organelles
This system exchanges oxygen and carbon dioxide between the body and the environment.
Respiratory System
This system removes waste and excess water from the blood and produces urine.
Urinary System
This term describes how different body systems work together to keep an organism functioning.
Interdependence
This structure is made of different tissues that work together to perform a specific function.
Organ
DAILY TRIPLE
This is the maintenance of stable internal conditions within an organism.
Homeostasis
This stores genetic information in living organisms.
DNA
This system provides support, protects internal organs, produces blood cells, and works with muscles to allow movement.
Skeletal System
DAILY DOUBLE
This system allows movement through the contraction and relaxation of muscles.
Muscular System
A person runs out of breath while exercising. Which two systems work together to deliver oxygen to the body?
The respiratory and circulatory systems
The Jellyfish falls into this level of organization.
Tissue
When the body sweats to help lower its temperature, it is maintaining this.
Homeotasis
This system is in charge of producing the red blood cells.
Skeletal System
This is the largest organ system and includes the skin, hair, nails, and glands.
Integumentary System
This system receives and processes information and coordinates the body's responses.
Nervous System
A person eats a meal. Which system breaks down the food, and which system transports the absorbed nutrients?
Digestive and circulatory systems
This level consists of different organs working together to perform complex tasks and includes all insects.
Organ system
This process causes inherited traits that improve survival or reproduction to become more common in a population over generations.
What is natural selection?
This level of organization includes planaria and other flatworms
Organ Level
This system identifies pathogens and responds to substances that can harm the body.
Immune System
This system produces and releases chemical messengers that regulate many body functions.
Endocrine System
If the nervous system cannot properly coordinate the muscles, which major body function would be directly affected?
Movement
DAILY DOUBLE
Put these levels in order from smallest to largest: organ, cell, organism, tissue, organ system.
Cell → tissue → organ → organ system → organism
If the kidneys stop removing excess water and wastes properly, which body process may be disrupted?
Homeostasis
This infectious agent contains genetic material but is not cellular and cannot replicate independently; we consider it to be at the organelle level.
A virus