Levels of Organization
The smallest/basic unit of life.
Cell
Responsible to breaking down food and absorbing its nutrients for energy. Includes the mouth, esophagus, stomach, intestines, and several other organs.
Digestive System
Circulates blood throughout the body, delivering oxygen to cells and helping dispose of carbon dioxide. Consists of the heart, veins, and arteries. AKA: cardiovascular system
Circulatory System
Takes in oxygen and gets rid of carbon dioxide. Includes the lungs, trachea, and diaphragm.
Respiratory System
Tissue that controls movement of body parts by contracting (shortening).
Muscle Tissue
Groups of specialized/similar cells that work together to perform the same job.
Tissues
Supports the body, protects organs, and helps with movement. Consists of bones, tendons, ligaments, and cartilage.
Skeletal System
Controls all movement of the body, including involuntary movements inside the body. Includes smooth, cardiac, and skeletal tissue.
Muscular System
Controls all body activity and detects information from the internal and external environments via the 5 senses. Includes the brain, spinal cord, and nerve cells that run throughout the body.
Nervous System
Tissue that directs and controls all activity in the body via electrical signals sent back and forth between the brain and the body.
Nervous Tissue
A living thing composed of many organ/body systems working together to keep it alive.
Organism
The name of the tube that connects the mouth to the stomach.
Esophagus
True or False: Arteries carry blood towards the heart and veins carry it away from the heart.
False
Nerve cells are called...
Neurons
Tissue that supports the body and connects all its parts. Examples include bone tissue and fat.
Connective Tissue
Groups of organs that work together to perform a major function.
Organ/Body System
Flexible, rubbery material that cushions bones at joints so they can rub together without wearing out.
Cartilage
What are the functions of red blood cells, white blood cells, and platelets?
Red blood cells deliver oxygen and take away carbon dioxide from body parts.
White blood cells fight infection.
Platelets clot blood, stopping wounds from bleeding.
True or False: Muscles are required to breathe.
True! The muscle under our lungs is called the diaphragm.
Tissue that makes up the surfaces of the body, inside and out. Example: skin
Epithelial Tissue
Groups of different tissues working together to perform a specific job.
Organs
Doctor who specializes in the digestive system.
Gastroenterologist
Where is smooth muscle tissue found?
Cardiac muscle tissue?
Skeletal muscle tissue?
Which one is controlled voluntarily? (NOT automatic)
Smooth: in organs
Cardiac: the heart
Skeletal: covering bones/skeleton
Skeletal muscle is voluntary.
The brain and spinal cord make up the ______ nervous system. Nerves make up the ______ nervous system.
Brain & spinal cord = central nervous system
Nerves = peripheral nervous system
True or False: Plants have cells, tissues, organs, and organ systems.
True