Circulatory System: Purpose: To deliver O2 & nutrients to all the

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Presentation transcript:

Circulatory System: Purpose: To deliver O2 & nutrients to all the cells of the body. To transport waste, produced by the cells,to the gills and kidneys for excretion. Examples of cellular waste: Carbon dioxide ammonia

Fish have: 1. Closed circulatory system Contained in blood vessels 2. A 1 loop system

Clean and dirty blood mix 3. A low efficiency system Why? Clean and dirty blood mix

A fish’s 1 loop system is made up of: Heart: pumps the blood Arteries: carries blood away from heart Veins: carries blood to the heart Capillaries: connects arteries to the veins -systemic (supply body) -respiratory (supply gills)

Circulatory System

Pathway of Blood: 3 4 2 1 Heart pumps blood thru arteries to capillaries in the gills Blood picks up O2 & releases CO2 through the gills From the gills the blood travels to body tissues where nutrients & wastes are exchanged Blood goes back to heart thru veins

veins gills Heart Gill capillaries arteries

A Fish’s heart- 1. muscular pump that circulates blood around body 2. Has 2 chambers Atrium (upper) Ventricle (lower)

Circulatory System: 1. Sinus venosus 2. Atrium 5. To gills 3.Ventricle 4. Bulbus arteriosus

Pathway thru HEART: CO2 dirty blood returns from body to Sinus Venosus (collection area) To large Atrium To muscular Ventricle (PUMP) To Conus/Bulbus Arteriosus ~ saturated with blood vessels -has valves to decrease backflow 5. To Aorta (large artery) to body

Circulatory System

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