The Circulatory System
This component of blood is responsible for carrying oxygen.
What are red blood cells?
This hormone, produced by the adrenal glands, helps the body respond to stress.
What is adrenaline (or epinephrine)?
These cells, also known as leukocytes, help fight infections in the body.
What are white blood cells?
This type of muscle is involuntary and is found in the walls of internal organs.
What is smooth muscle?
This largest part of the brain controls voluntary actions, speech, and thought.
What is the cerebrum?
This organ is responsible for pumping blood throughout the body.
What is the heart?
This gland, often called the 'master gland,' regulates growth and other hormones.
What is the pituitary gland?
This organ filters and stores blood and helps fight infections.
What is the spleen?
This muscular organ pumps blood throughout the body.
What is the heart?
This part of the nervous system includes the brain and spinal cord.
What is the central nervous system?
These vessels carry oxygen-rich blood away from the heart.
What are arteries?
This hormone regulates blood sugar levels and is produced by the pancreas.
What is insulin?
This organ in the immune system produces T-cells and is most active during childhood.
What is the thymus?
This protein in muscle fibers is essential for muscle contraction.
What is myosin?
These cells are the basic building blocks of the nervous system.
What are neurons?
This component of the circulatory system helps blood clot when injuries occur.
What are platelets?
This hormone is responsible for regulating calcium levels in the blood and bones.
What is parathyroid hormone (PTH)?
This clear fluid circulates through the lymphatic system, helping to remove toxins.
What is lymph?
This muscle in the upper arm is responsible for flexing the elbow.
What is the biceps brachii?
This part of the nervous system controls involuntary functions like heartbeat and digestion.
What is the autonomic nervous system?
This large vein carries deoxygenated blood from the body back to the heart.
What is the vena cava?
This endocrine gland, located above the kidneys, produces cortisol and adrenaline.
What are the adrenal glands?
This condition occurs when the lymphatic system cannot drain properly, causing swelling.
What is lymphedema?
This muscle type is found only in the heart and contracts involuntarily.
What is cardiac muscle?
This insulating layer around nerves speeds up electrical impulses.
What is myelin?