Studied by 2 people
what are five levels of structural organization in order from largest to smallest?
Organisms, organ systems, organs, tissues, cells
What is the importance of homeostasis?
Maintains optimal conditions for enzyme action throughout the body, as well as all cell functions
Give an example of an organ and an organ system.
Organs: Lungs, heart, brain
Organ systems: Respiratory system, Nervous system, Muscular system, Skeletal system
Endocrine system
production and secretion of hormones for regulation of the body
Muscular system
movement and stabilization
Nervous system
collect, process, and respond to sensory information; control voluntary and involuntary actions
Skeletal system
support, protection for internal organs, and aids in movement
What is the importance of the skeletal system?
It supports and protects the organs.
What are the two different kinds of bones in our body?
compact and spongy
What two systems work together to allow our body to move?
muscular and skeletal
How does your nervous system take on information?
neurons
Example of voluntary control:
running; hitting someone
Example of involuntary control:
blinking; breathing
What is the first line of defense of the human body?
skin
WHat is the second line of defense of the human body?
the immune system
What does the liver do in the human body?
It filters blood and removes waste.
What is the importance of the excretory system?
It gets rid of waste.
How are the lungs a part of the excretory system?
They help eliminate carbon dioxide.
What is responsible for making white blood cells?
bone marrow
What are three types of muscle cells?
Skeletal muscle, smooth muscle, cardiac muscle
List the three main types of blood.
Arteries, Veins, Capillaries
What is the function of the lymphatic system?
It keeps fluid levels in balance and defends the body against infection. Produces white blood cells.
Arteries function:
carry blood away from the heart
Veins
carry blood to your heart
Capillaries
connects arteries and veins
Skeletal muscle location:
attached to bones or tendons
Smooth muscle location:
the walls of hollow visceral organs
Cardiac muscle location:
in the heart
