Nervous System
This division of the nervous system is active when we are in a calm state, carrying out activities such as resting and digesting.
What is parasympathetic nervous system
Acting to clear the blood of microbes as well as old damaged red blood cells and platelets, this largest organ of the lymphatic system resides on the left side of the upper abdomen.
What is the spleen
Millions of these microscopic air sacs create a huge surface area where oxygen and carbon dioxide are exchanged between the lungs and the blood.
What are alveoli
Normal range being 60-100 beats per minute, THIS is the term for the number of beats per minute of the heart when the body is not in motion.
What is resting heart rate
Fun fact: There are 206 of these organs that make up the framework of the human body.
What are bones
Responsible for fine tuning our muscular control, the name for this brain region literally means “little brain”.
What is cerebellum
These patches of lymphoid tissue form a ring around the entrance to the throat, where they help protect against bacteria or viruses that could be inhaled or swallowed.
What are tonsils
These folds of connective tissue sit above the opening of the larynx and vibrate during speech.
What are the vocal cords
Blood that is low in oxygen and high in carbon dioxide is pumped out of this heart chamber to get to the lungs.
What is the right ventricle
Fun fact: There are over 600 of these organs that provide the body with movement.
What are muscles
These types of neurons sit in the brain and spinal cord and are responsible for integrating the information that is sent to them by receptors.
What are interneurons
THIS lymphoid tissue is found in the ends of long bones, ribs, sternum, and vertebrae.
What is red bone marrow
This flap of connective tissue has failed to do its job if food enters the trachea and choking results.
What is the epiglottis
The largest of the body’s arteries, this blood vessel gives rise to all the arteries and arterioles that deliver oxygenated blood to the body’s tissues.
What is the aorta
Fun fact: You will find about 250 million molecules of this protein packed inside one red blood cell, so that it can carry out its essential role of oxygen transport.
What is hemoglobin
These nervous system cells, whose name literally means glue, offer support to the neurons that they surround.
What are neuroglia
These bean-shaped structures of the lymphatic system are located around the body and cleanse the fluid as it slowly filters through.
What are lymph nodes
Contraction of THIS dome-shaped muscle causes the chest cavity to expand and the lungs to fill with air.
What is the diaphragm
Ions, nutrients, and hormones are transported throughout the body in this, the liquid part of blood.
What is plasma
Fun fact: The tongue is covered in about 8000 of these, each containing up to 100 cells that help us sense flavor.
What are taste buds
Without this lobe of the brain, we would not be able to think, decide, or use reasoning and logic.
What is the frontal lobe
These clusters of lymph nodules along the small intestine help keep bacteria from passing through the intestinal wall and into the bloodstream.
What are Peyer’s patches
Respiration centers in this area of the brain control our involuntary basic breathing rate.
What is the brainstem
Closing of these connective tissue structures in the heart is what creates the “lub-dup” sound of a heartbeat.
What are valves
Fun fact: It is said that the fastest-moving muscle in the human body is the orbicularis oculi, capable of contracting in less than 1/100th of a second. The orbicularis oculi muscle is responsible for this everyday facial movement.
What is blinking