Respiratory System
The main function of the respiratory system is to get this gas into the blood.
Oxygen
Where are blood cells made?
Bone marrow (inside your bones!)
This is your largest organ and the first line of defense against germs.
Your skin!
How many main layers does skin have?
Three! They are the epidermis, the dermis, and the hypodermis.
The Nervous System has two main parts, the peripheral nervous system (PNS) and the ?
Central Nervous System (PNS)
When you take a breath, this muscle, which is below your lungs, contracts.
Diaphragm
The upper chambers of the heart
Atria
This system is part of your immune system. It contains vessels and "bean" shaped nodes throughout your body.
The lymph or lymphatic system
Your body produces this vitamin from exposure to sunlight.
Vitamin D
A nerve cell processes and transmits information. What is it called?
Neuron
The gas that leaves your body as you exhale.
Carbon Dioxide
Blood travels from the body to the heart through this vein. *Hint - it has 2 parts!
The superior and inferior Vena Cava.
Another name for white blood cells
Leukocytes
Freckles are a buildup of this substance, which determines your skin, hair and eye color.
Melanin
This is a long, tube-shaped bundle of neurons, protected by the vertebrae. It runs from the brain stem to the lower back. Its main job is to carry nerve impulses back and forth between the body and brain.
The spinal cord
You have millions of these air-filled, capillary covered sacs in both of your lungs. They are the site of external respiration (the process by which gases exchange between the air and the bloodstream).
Alveoli
Over half of your blood (55%) is made of this pale yellowish fluid.
Plasma
This organ, located in the upper left abdomen, helps to filter blood, recycles old red blood cells, and fights certain bacteria.
The spleen
Skin is the thinnest on this part of the body.
The eyelids
The Central Nervous System is made up of what two parts?
The brain and the spinal cord
This structure is also known as the "windpipe".
Trachea
This is the largest artery in your body. It carries oxygen rich blood from your heart to the rest of your body.
These patches are located throughout the small intestine and they prevent pathogen growth.
Peyer's patches
This protein is the key structural material that makes up hair, nails, and the outer layer of skin. It provides structural support and acts as a protective barrier against UV radiation, pathogens, and chemical exposure.
Keratin
What are the 3 main parts of the brain?
The Cerebrum, the Cerebellum, and the Brain Stem.