Thrombocytes, Leukocytes, and these make up the 'formed elements'

These vessels carry blood away from the heart. They may or may not be carrying large concentrations of oxygen.

These air filled sacs in the lungs directly take part in gas exchange.

This component of saliva serves to lubricate food for easier passage.

This is the segment of the small intestine by where most digestive enzymes and juices enter.

An excess of carbon dioxide in the blood will result in this. The same process is currently occurring in our oceans.

These blood vessels work to transfer nutrients between the blood and tissues. They are called the 'primary exchange vessels'.

It is for this process that we require oxygen.

This is the involuntary movement of muscle that serves to move digestive substances along a passageway.

These three glands secrete saliva into the oral cavity.

This is the formation of red blood cells, or erythrocytes.

This chamber pumps blood from the heart to the tissues of the body, not the lungs.

This 'center' in the brain is responsible for establishing basic breathing pattern.

This isn't really an enzyme, but it does serve to aid enzymes in the digestion of lipids.

This model suggests that enzymes undergo a conformational change to fit their active site to the substrate. That is, they change shape.

This "-stasis" is the regulation of blood flow.

This tunica layer is identified as a muscular wall in arteries and veins.

This type of breathing is common to mammals. It is where air is forced into the lungs by increasing the volume of the chest cavity, thus reducing the pressure in the lungs

This venous network acts to deliver blood from the gastrointestinal tract to the liver. Effectively routing everything absorbed after digestion through the liver.

These are the rigid folds in the stomachs' inner surface. They act to churn food.

This is where most blood cells are formed. It is said to be a colorful place.

This extensible protein allows arteries to stretch and recoil.

The process by where molecules move from a high concentration to a low concentration without the use of energy.

A protease, this enzyme digests proteins. It is released in the stomach along with HCl.

Where inhibition is the regulation of enzyme activity, this specific type works by blocking the active site of the enzyme. Thereby, out competing the substrate.