INTRODUCTION TO CIRCULATORY SYSTEMS Flashcards
these require a continuous supply of nutrients, oxygen and removal of waste products
CELLS
in very small animals, materials are exchanged by what?
DIFFUSION
this provides a medium for diffusion of oxygen, nutrients, and wastes
fluid between the cells (INTERSTITIAL FLUID)
evolution of specialized circulatory systems allowed animals to increase in ____; reduced the distance needed for _______
SIZE; DIFFUSION
the human circulatory system (cardiovascular system) includes these three
heart,
blood vessels, and
blood
what kind of circulatory systems are present in sponges, cnidarians, flatworms, or nematodes
NO SPECIALIZED CIRCULATORY STRUCTURES
in _______, the central gastrovascular cavity is a circulatory and digestive organ
CNIDARIANS
in _______, its flattened body permits effective gas exchange by diffusion
FLATWORMS
in _______, fluid in their body cavities circulate materials
NEMATODES
_______ ANIMALS require a circulatory system to efficiently distribute materials
LARGER
a connective tissue consisting of cells and cell fragments dispersed in plasma
BLOOD
a circulatory system consists of three parts:`
BLOOD
a PUMPING ORGAN (generally a heart)
BLOOD VESSELS
TWO TYPES OF CIRCULATORY SYSTEMS
OPEN CIRCULATORY SYSTEMS
CLOSE CIRCULATORY SYSTEMS
this type of circulatory system has a heart that pumps blood into vessels with OPEN ENDS
OPEN CIRCULATORY SYSTEMS
ARTHROPODS and most MOLLUSKS have what type of circulatory system?
OPEN CIRCULATORY SYSTEMS
