What are the smallest blood vessels called?
Capillaries
What is the first layer of the skin called?
Epidermis
A tough band of tissue that connects bone to bone
Ligament
The part of the nerve cell that carries messages to the cell body
Dendrite
Who is responsible for taking care of our groundwater?
Everyone
What are the clusters of thin-walled air sacs surrounded by capillaries called?
Alveoli
Which organ connects your mouth to your stomach?
Esophagus
_________ muscles are what you CAN'T control and ________ muscles are what you CAN control.
Involuntary and Voluntary
What does the pineal gland produce?
Melatonin
What fuels the flow of energy through an ecosystem?
The Sun
Blood does not run backwards in the heart because of these structures
Valves
What protects skin and helps maintain body temperature?
Hair
A rubbery layer of tissue that acts as a shock absorber and friction reducer found at the end of bones where they form joints
The two parts of the nervous system are the _________ and the __________.
Central and Peripheral
In this picture which organism is the autotroph?
Grass
What is main muscle of the respiratory system?
Diaphragm
In __________ digestion, food is broken down by enzymes.
Chemical
Name the three different types of muscles found in the body
Skeletal, Cardiac, and Smooth
The internal stability or regulation of steady, life maintaining conditions inside an organism is called __________.
Homeostasis
Which term describes the number of different biotic species in an area?
Biodiversity
Using only the four main chambers of the heart, what is the correct order of blood flow?
Right Atrium, Right Ventricle, Left Atrium, Left Ventricle
Which part of your skin gathers information?
Nerves/Nerve Receptors
A tough, tight-fitting membrane that covers the bone's surface is called the __________.
Periosteum
The part of the kidney responsible for filtering the blood.
Nephron
The area near Earth's surface where the pores contain a mixture of air and water is a region called the _________________, and the area farther beneath the surface where pores are completely filled with water is called the ________________________.
Unsaturated Zone and Saturated Zone