The Circulatory System
This is the primary role of the circulatory system.
What is transporting nutrients, gases, and waste products around the body?
Arteries carry blood in this direction relative to the heart.
What is away from the heart?
Veins carry blood in this direction relative to the heart.
What is toward the heart?
This component of blood carries oxygen using hemoglobin.
What are red blood cells?
This is the main role of the digestive system.
What is to take in food, digest it, and expel wastes?
The circulatory system helps maintain this internal condition, crucial for survival.
What is thermoregulation or a constant body temperature?
These arteries carry oxygenated blood to the body tissues.
What are systemic arteries?
These veins transport high-oxygen blood from the lungs to the heart.
What are pulmonary veins?
These blood cells fight infection.
What are white blood cells?
This 7-meter-long tube is where digestion occurs.
What is the alimentary canal, digestive tract, or gut?
This function of the circulatory system helps prevent dehydration.
What is maintaining fluid balance?
These arteries carry low-oxygen blood to the lungs.
What are pulmonary arteries?
These structures prevent blood in veins from flowing backward.
What are valves?
Platelets have this critical function in blood.
What is clotting?
Food takes approximately this long to pass through the entire digestive system.
What is 24 hours?
The circulatory system is also critical for defending against this.
What is infection?
This is why arteries have thick walls.
What is to withstand high pressure from the heart's pumping action?
After leaving capillaries, blood enters these small veins first.
What are venules?
This liquid component of blood is 90% water.
What is plasma?
These are the two types of digestion, and they occur in different ways.
What are mechanical digestion and chemical digestion?
The circulatory system helps prevent excessive blood loss through this mechanism.
What is clotting or coagulation?
Pulmonary arteries carry blood from this part of the heart to the lungs.
What is the right ventricle?
Systemic veins return blood to this chamber of the heart
What is the right atrium?
Red blood cells are produced in this part of the body
What is the bone marrow?
The enzymes involved in chemical digestion have this primary role.
What is breaking down food into smaller chemical components?