BIO 112 Circulatory System

thermoregulation, osmoregulation, immune, and transporting materials

functions of a circulatory system

open circulatory system

blood not contained in veins, tubes, etc

closed circulatory system

blood contained in veins, arteries, etc

atria

receives blood into heart

ventricles

pump blood out heart

arteries

carry blood away from heart to organs

branch into arterioles.

within organs _____

infiltrate the tissue

capillaries in the capillary beds ___

venules

capillaries converge into ____

veins

venules converge into ____

1 atrium 1 ventricle

fish heart

2 atria 1 ventricle

amphibian and most non-avian reptile heart

2 atria and 2 ventricles

crocodilian, bird, and mammal heart

plasma, red blood cells, white blood cells, platelets

makes up blood

plasma

liquid matrix, makes up 55% blood volume, helps maintain blood pH with electrolytes, transports blood cells and materials

red blood cells

erythrocytes, bioconcave for large diffusion of O2, loaded with hemoglobin

white blood cells

leukocytes, engulf and break down invaders, produce chemicals that harm invaders

platelets

cell fragments involved in clotting