About AE   About NHM   Contact Us   Terms of Use   Copyright Info   Privacy Policy   Advertising Policies   Site Map
Custom Search of AE Site
spacer spacer

Access Excellence Classic Collection

The Heart and the Circulatory System

Anterior: adjective referring to front end of an animal or organism.

Aorta: the main systemic artery of the body, emerging directly from the left ventricle.

Arteriole: a small arterial branch that delivers blood directly to a capillary bed.

Artery: a muscular blood vessel that carries blood away from the heart.

Arthropod: Phylum which is bilaterally symmetric segmented animal with tough, chitinous exoskeleton. Phylum contains crustaceans, insects, spiders, centipedes and millipedes.

Atrium: one of the chambers of the heart that receives blood directly from a vein.

Circulatory system: the system of the body responsible for internal transport. Composed of the heart, blood vessels, lymphatic vessels, lymph, and the blood.

Closed circulatory system: a type of circulatory system where the blood is contained within a system of vessels and the heart.

Coronary artery: one of the arteries that supply blood to the heart.

Coronary vein: one of the veins that receive blood from the heart muscle and empty directly into the right atrium.

Deoxygenated blood: blood that is low in oxygen concentration.

Dorsal: adjective referring to the top or upper surface of an organism.

Heart: the muscular organ composed of cardiac muscle that is responsible for pumping blood throughout the body.

Heart attack: a condition occurring when a section of the heart is deprived of oxygenated blood and dies.

Interstitial fluid: the fluid filling the microscopic spaces between cells of the body.

Mollusca: phylum of bilaterally symmetrical invertebrates. Primarily marine invertebrates, but also includes land snails and slugs.

Open circulatory system: a type of circulatory system where the blood is not contained within a system of vessels and the heart. Blood empties from vessels into sinuses and then returns through other vessels to a "heart.".

Peristalsis: wave-like muscular contractions in the walls of tubular organs, e.g. the alimentary canal. Peristalsis serves to push material contained within the organ along its length.

Posterior: adjective referring to the hind end of an animal.

Pulmonary artery: one of the arteries carrying deoxygenated blood from the heart to the lungs.

Septum: the wall dividing the two ventricles.

Sinus: a cavity into which blood flows and baths the internal organs in organisms with an open circulatory system.

Spiracle: opening which leads to a trachea in an insect, arachnid, isopod, centipede or millipede.

Vein: one of the blood vessels that carries blood to the heart.

Ventral: adjective referring to the lower surface of an animal or organism.

Ventricle: one of the muscular chambers of the heart that is responsible for pumping blood from the heart into the arteries.

Venule : a small venous branch that carries blood from a capillary bed to a vein.

For further information please see:

AE Classic Collection Index

Resource Center Index

Activities Exchange Index

Custom Search on the AE Site