BIO271H1 Lecture Notes - Lecture 9: Atrioventricular Node, Coronary Circulation, Circulatory System
Document Summary
In the body cavity, there are ciliated flame cells that are actually part of an excretory system and they help move fluid by bulk flow around the gastro vascular cavity. Simple tubular heart structure that can pump the blood. Movement is created by body movement and cilia. Closed system leeches: tube and earth worms circulate interstitial fluid with cilia muscular contractions of body wall. Circulatory plan of vertebrates all have closed system. Anastomoses: connection of separate parts of a branching system to form a network, one artery sometimes connects with another artery which is important in joints. When you bend a joint, you bend your needs. Your arteries become constricted so the anastomoses allows blood to move around the contracted part to get where it needs to. Blood vessels: complex wall surrounding a central lumen, wall composed of up to three layers. Reduced friction of blood that moves through the tubes.
